The 6 Best Sleeping Bags of 2026 (Add 15 Degrees to the Number on the Bag)

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Our quick picks

Ranked by what each one is best at, not by a score we made up. Ratings are what the product showed on Amazon when we last checked — how we rank.

Everything below is the why: the specifications that settle the choice, and where each pick falls down.

A 20-degree sleeping bag is not a bag you will be comfortable in at 20 degrees. It is, at best, a bag in which an average man curled up in thermal underwear will survive the night at 20 degrees without hypothermia. Those are very different claims, and the gap between them is where most cold, miserable nights come from.

The reason is how the ratings work. The international standard, ISO 23537, produces two numbers from the same test: a comfort rating, describing the temperature at which a standard adult woman sleeping in a relaxed posture stays comfortable, and a limit rating, describing the temperature at which a standard adult man sleeping curled up is on the edge of being cold. Manufacturers overwhelmingly market the limit number, because it is the lower and more impressive one. So the honest rule of thumb is to add about 10 to 15 degrees Fahrenheit to the number on the bag to get the temperature you will actually sleep well at.

And a further caveat: many bags sold online carry no standardised rating at all. If a listing does not mention ISO 23537 or EN 13537, the number is a marketing figure produced by the manufacturer’s own judgement, and it should be treated with more skepticism still.

The second thing, which matters even more: the pad under you matters more than the bag over you. Below your body the insulation is squashed flat and does almost nothing, and the ground conducts heat away far faster than air carries it. A 30-degree bag on a well-insulated pad will keep you warmer than a 0-degree bag on a thin one. Below are six bags across down and synthetic, mummy and rectangular, backpacking and car camping, plus the safety section that matters when you get this wrong. If you are planning a trip, our guides to the best camping tents and the best coolers cover the rest.

Quick picks

• Best overall: Kelty Cosmic 20 — a long-standing down mummy bag for backpacking, now with recycled fabrics and a PFAS-free treatment.
• Best synthetic and best for side sleepers: NEMO Forte — a spoon shape with room at the elbows and knees, plus vents that widen its usable range.
• Best value mummy bag: Teton 20F/5F — a warm, lofty mummy bag with a well-designed hood at a fraction of premium pricing.
• Best for cold weather and taller campers: Coleman North Rim 0°F — rated to 0°F, with a big-and-tall cut and a draft tube behind the zip.
• Best budget all-rounder: MalloMe — inexpensive, light enough to carry, and warm enough for three-season car camping.
• Best for car camping comfort: REDCAMP cotton flannel — a big rectangular bag lined in flannel that feels like bedding rather than equipment.

Read this first: staying warm safely

A sleeping bag rating is a laboratory figure, not a guarantee, and a cold night outdoors is a genuine medical risk rather than a discomfort. What follows is general safety information rather than medical advice; if you are planning a trip in conditions near or below freezing, particularly with children, older adults, or anyone with a health condition, the guidance from your local mountain rescue, park service or an experienced instructor is worth more than any product review.

Insulate from below before you spend on the bag

If you take one thing from this guide, take this. Your body weight compresses the insulation underneath you until it is doing almost nothing, and the ground pulls heat out of you by conduction, which is far more effective than the air convection the bag is designed to stop. Sleeping pads are rated by R-value, a measure of resistance to heat flow.

• R-value 1 to 2: summer only. A cheap foam pad or a basic air mattress.
• R-value 3 to 4: three-season use. This is the sensible minimum for spring and autumn.
• R-value 5 and above: winter and freezing ground.
• Air mattresses without insulation are worse than nothing. A tall uninsulated air bed lets air circulate underneath you and can be colder than lying on foam. This surprises a lot of first-time campers.
• Stacking works. A closed-cell foam pad under an inflatable one adds R-value and gives you a backup if the inflatable punctures.

Spending on a warmer bag while lying on a thin pad is the most common way people waste money in this category.

Recognizing cold trouble

Hypothermia begins well above freezing, particularly when someone is wet, tired, underfed or in wind. Early signs are shivering, cold hands and feet, and clumsiness. As it progresses, shivering may stop, speech becomes slurred, and thinking becomes confused — and the person affected is often the last to realize it, which is why you watch your companions rather than yourself.

If someone is showing signs: get them out of wind and wet, remove wet clothing, insulate them from the ground, add dry layers and a bag, and give warm sweet drinks if they are fully alert. Do not give alcohol, do not rub the limbs, and do not put someone who is severely affected into a hot bath. Severe hypothermia — confusion, no shivering, very slow breathing — is a medical emergency and needs professional help. Learn the signs properly before a cold trip; a wilderness first aid course is a better investment than a warmer bag.

Things that actually keep you warm in the bag

• Eat before bed. Digestion generates heat, and a sleep cold night is often a calorie problem rather than a gear problem. A snack with some fat in it before you get in makes a real difference.
• Wear a hat. Even with a hood, a thin beanie is the cheapest warmth upgrade available.
• Change out of anything damp, including clothes damp with sweat from hiking. Sleep in dry base layers kept for that purpose.
• Do not over-layer inside the bag. Thick clothing compresses the insulation against you and reduces loft. One dry base layer plus socks and a hat beats a puffy jacket inside the bag.
• Vent before you sweat. Sweat wets the insulation from inside, which is how a bag gets progressively colder over several nights. Open the zip a little rather than overheating.
• A bottle of hot water in a secure bottle, placed between the thighs rather than at the feet, warms the core efficiently. Check the bottle is rated for hot water and the lid is tight.
• Empty your bladder before sleeping. Keeping urine warm costs energy, and getting up at three in the morning costs more.

Two safety rules that have nothing to do with the bag

• Never use a stove, heater, lantern or barbecue inside a tent, ever, even to take the chill off, even with a vent open. Combustion produces carbon monoxide, it is odorless, and tent fatalities from it happen every year. If you need heat in a tent, you need more insulation and more clothing instead.
• Do not put an infant in an adult sleeping bag. Safe sleep guidance for babies applies when camping too — on their back, on a firm flat surface, in their own space, with nothing loose over them. Purpose-made infant sleep systems exist; an adult bag is not one.

How this list was made

We built this list from current Amazon listings, manufacturer specifications and the recurring patterns in verified buyer feedback. We have not slept in all six of these at their rated temperatures, and we are not going to imply we ran comparative cold-chamber tests. What we did was assess each bag on the things that determine whether it performs: insulation type and quality, whether a standardised rating is quoted, the presence of draft collars and zip baffles, shape and fit, packed size and weight, and what owners report about the temperature at which they were actually comfortable.

We weighted heavily toward reviews that mention specific conditions, because “this bag is warm” from someone camping in July tells you nothing. We weighted heavily against recurring reports of zips snagging or failing, of down migrating out of baffles, and of bags that pack down far larger than claimed.

Every pick holds a customer rating of 4.3 stars or better. Two notes. First, one pick has an exceptionally high rating on a small and recent review base, and we flag that in its entry rather than treating it as equivalent evidence. Second, we excluded a well-regarded ultralight down bag from a respected brand because its current rating sits well below our threshold, with complaints about construction rather than design — a reminder that a good name does not guarantee a good production run.

What to know before you buy

Down or synthetic?

This is the main decision and it comes down to how likely the bag is to get wet.

• Down is far warmer for its weight and packs much smaller, which is why serious backpackers use it. Its weakness is water: wet down collapses and loses nearly all its insulation, and it dries slowly. It also costs more, and it needs careful washing.
• Synthetic is heavier and bulkier for the same warmth, and it keeps insulating when damp, dries faster, costs less, and does not care if you treat it badly. For car camping, canoeing, humid climates, or anyone who does not want to be careful with their gear, it is the sensible choice.
• Hydrophobic or treated down sits between the two: down treated to resist moisture, which delays the collapse without eliminating the problem. It helps in damp conditions and is not a solution for a soaked bag.
• PFAS-free treatments are now appearing, which matters because the traditional durable water repellent chemistry is under regulatory pressure and environmental scrutiny. One of the picks below calls this out specifically and it is a reasonable thing to prefer.

Fill power is not the same as warmth

Down is graded by fill power, typically from around 550 to 900, which measures how many cubic inches an ounce of it fills. Higher fill power means more loft per unit of weight — so it is a measure of efficiency, not of total warmth.

Total warmth comes from fill power multiplied by fill weight. A bag with 800 fill power and a small amount of down can be less warm than one with 600 fill power and a lot of it — it will simply be lighter and pack smaller. So for backpacking, high fill power is worth paying for because it saves weight; for car camping it buys you almost nothing, because a heavier, bulkier bag with cheaper insulation keeps you just as warm.

Shape decides both warmth and whether you sleep

• Mummy: tapered, hooded, and the warmest and lightest shape because there is less air to heat and less fabric to carry. Also the most restrictive, and actually uncomfortable for some people, particularly side sleepers and anyone who moves at night.
• Semi-rectangular and spoon shapes: extra room at the elbows and knees while keeping a tapered footbox. The best compromise for side sleepers who still want a bag that works below freezing.
• Rectangular: roomy, comfortable, usually without a hood, and much colder for its weight because there is a large volume of air to heat and a big opening at the top. Fine for car camping in mild weather, wrong for cold or for carrying.
• Double bags sleep two, are warmer than two singles pressed together in principle and colder in practice if one person is a duvet thief. They are car camping items.
• Quilts have no back insulation at all, on the logic that the back insulation is doing nothing anyway, and attach to the pad. Lightest option, and they need a good pad and some technique.

Fit: too big is as bad as too small

A bag that is too long or too wide has a volume of cold air your body has to heat, and it will feel colder than the rating suggests. A bag that is too small compresses the insulation against you at the shoulders and feet, which creates cold spots exactly where you notice them.

Check the stated maximum user height and the shoulder and hip girth, and compare against your own measurements rather than assuming the regular size fits. Wide and long versions exist for a reason. If you are between sizes and camping in the cold, the smaller one is usually warmer; if you toss and turn, take the roomier one and accept a slightly colder night.

The details that stop heat escaping

• A draft collar — an insulated tube around the shoulders inside the bag — is the single most effective cold-weather feature, because the shoulder opening is where warm air is pumped out every time you move. Bags rated below about 20°F should have one.
• A draft tube behind the zip stops heat leaking along the zipper line. Check it is there and that it is insulated rather than just a flap of fabric.
• A hood that actually cinches. A large proportion of heat loss is from the head, and a hood you can draw closed around your face with a drawcord is worth more than a few degrees of rating.
• A well-shaped footbox. A flat footbox presses insulation against your toes; a boxed or trapezoidal one keeps loft where your feet are, which is where people get cold first.
• Zip quality and a snag guard. The zip is the most common failure on any sleeping bag, and a two-way zip lets you vent at the feet without opening the top.
• Left or right zip. If you want to join two bags together, you need one of each. Check before ordering two of the same.

Packed size, weight and storage

For backpacking, weight and packed volume matter more than anything except warmth; for car camping neither matters at all, which is why buying a backpacking bag to sleep in a tent next to your car is spending a lot for nothing.

More important than either is how you store it. Keeping a bag compressed in its stuff sack between trips permanently damages the insulation, down and synthetic alike. Store it loose, in the large mesh or cotton sack that good bags ship with, or hanging in a wardrobe. A bag stored properly lasts many years; a bag left crushed in a stuff sack in a garage loses its loft in two or three.

The 6 best sleeping bags

1. Kelty Cosmic 20 — best overall

The Cosmic has been Kelty’s answer to the same question for a long time: how much down bag can you get for a sensible amount of money. It is a down mummy bag rated at 20 degrees, light enough and compressible enough for backpacking, and warm enough for three seasons in most of the country — which is exactly the specification most people actually need and the one most often overspent on.

Two things about the current version are worth noting. Kelty has moved to recycled nylon and recycled polyester taffeta for the shell and lining, and it states plainly that the bag is PFAS-free — which matters because the traditional water-repellent treatments used across outdoor gear are the chemistry now under the most regulatory and environmental scrutiny. Getting that without a price premium is a genuine reason to prefer it. Customer rating is 4.7 stars, the highest of the established products here.

Why it made the list: down warmth at a non-specialist price, in the rating that covers the most nights, from a brand that has made this bag long enough to have got it right. For anyone who camps a few times a year and occasionally carries their kit, this is the bag to buy without further research.

What you give up: it is a 20-degree bag, which as explained above means comfortable somewhere nearer the low thirties — do not take it into freezing conditions and expect to sleep well. Down means you must keep it dry, and a soaked down bag is a serious problem rather than an inconvenience, so a dry bag or a good pack liner is part of the purchase. It is a mummy cut, so side sleepers and restless sleepers may find it confining; the NEMO below is the answer to that. And check the zip side before buying if you intend to pair two bags.

Who it is for: most campers and backpackers. Three-season use, a few trips a year, and anyone who wants down without specialist pricing.

See the Kelty Cosmic 20 on Amazon →

2. NEMO Forte — best synthetic and best for side sleepers

Mummy bags are the warmest shape and they are also the reason a lot of people say they cannot sleep in a sleeping bag. NEMO’s answer is its Spoon shape: extra width at the elbows and the knees while keeping the taper at the feet and the hood at the top, so you can lie on your side with your knees bent without fighting the bag. If you have ever woken up with the bag twisted around you, this is the design that fixes it.

It also has two features worth understanding. Thermo Gills are zipped vents across the chest that let you dump heat without opening the bag to the cold air, which extends the usable range upward by a meaningful amount — a bag you can use on a mild night as well as a cold one is a bag you use more. And the Blanket Fold at the top gives an oversized draft collar that behaves like a folded-over duvet, which is both warm and psychologically more like a bed. It is synthetic, so it tolerates damp. Customer rating is 5.0 stars, though on a very small and recent review base, so treat that as promising rather than proven.

Why it made the list: the spoon shape and the vents together solve the two things people dislike about technical sleeping bags — restriction and overheating. For a side sleeper, it is the difference between using a proper bag and giving up and buying a rectangular one that is cold.

The part that annoys people: the 5.0-star rating rests on very few reviews, which is much weaker evidence than a 4.7 on thousands — buy it for the design rather than the rating. Synthetic insulation means it is heavier and bulkier than a down bag of the same warmth, so it is a good three-season bag rather than an ultralight one. The extra width at the elbows and knees is more air to heat, so it will feel marginally cooler than a tight mummy of the same rating. And NEMO is a premium brand with premium pricing.

Who it is for: side sleepers, restless sleepers, damp climates, canoe and kayak trips, and anyone who has previously found mummy bags unbearable.

See the NEMO Forte on Amazon →

3. Teton 20F/5F — best value mummy bag

Teton has built a business on giving you most of the specification of a premium bag for a fraction of the price, accepting more weight and bulk in exchange. This mummy bag is sold in 20-degree and 5-degree versions, which means you can buy actual cold-weather capability without premium spending, and Teton pays attention to the hood — which is the right place to spend effort, because an ineffective hood costs more warmth than almost any other shortcoming.

It is lofty and warm, and light enough that carrying it is reasonable even if it is not an ultralight bag. Customer rating is 4.4 stars across a very large review base built over many years, which for a value product is meaningful evidence rather than early enthusiasm.

Why it made the list: it is the pick for someone who wants a warm mummy bag and does not want to spend like a thru-hiker. The 5-degree version in particular is a lot of cold-weather bag for the money, and for occasional winter camping that is a better use of funds than a high-fill-power down bag you use twice a year.

Where it disappoints: synthetic fill means it is heavier and bulkier than a down bag of the same rating, and the packed size is noticeably larger — check that against your pack before a long trip. Teton’s temperature ratings are widely reported by owners as optimistic even by the standards of this category, so apply the plus-15-degree rule generously rather than conservatively. Zip quality is the most common complaint at this price point across all brands, and this is no exception, so operate it gently. And check the exact version and temperature rating you are ordering, because the listing covers several.

Who it is for: budget-conscious campers, occasional winter use, scouts and groups buying several bags, and anyone who wants warmth over weight.

See the Teton 20F/5F sleeping bag on Amazon →

4. Coleman North Rim 0°F — best for cold weather and taller campers

Two specific problems, one bag. The first is genuine cold: this is rated to 0 degrees Fahrenheit, which with the usual correction makes it a comfortable bag around the mid-teens and a survivable one well below that — considerably more capable than the 20-degree bags most people default to. The second is size: it is cut for campers up to six feet two, which is a real omission in a category where the standard bag assumes a person of average height and taller campers end up with their feet pressed against the footbox insulation, which is exactly where cold spots form.

Coleman has also put a Thermolock draft tube behind the zipper, which is the feature that stops heat leaking along the zip line and is frequently missing at this price. Customer rating is 4.4 stars, and Coleman’s parts and warranty network is as broad as anyone’s in camping.

Why it made the list: a properly cold-rated mummy bag with a big-and-tall cut and a real draft tube, at a mainstream price. For late-season camping, hunting, or anyone over six feet who has been cold in a standard bag, it addresses the actual problem rather than adding a feature.

The drawbacks: a 0-degree synthetic bag is a large, heavy object — this is a car camping and short-carry bag, not something to put in a backpack for a week. Being cut generously means more air volume to heat, so a smaller person will find it cooler than the rating implies; if you are not tall, a standard-cut bag of the same rating will be warmer. As with every bag in this price range, the zip is the part to treat carefully. And it takes up a lot of space stored properly, which it should be.

Who it is for: cold-weather car camping, late autumn and winter trips, hunting, and campers over six feet tall.

See the Coleman North Rim 0°F on Amazon →

5. MalloMe — best budget all-rounder

This is the bag to buy when the alternative is not camping, or borrowing something, or sleeping under a duvet in a tent. It is inexpensive, it compresses reasonably, it is light enough to carry a short distance, and it is warm enough for three-season camping in most of the country. Customer rating is 4.5 stars on an extremely large review base — among the most-reviewed sleeping bags on the platform.

What earns it a place rather than a dismissal is that a huge number of people camp two or three nights a year, in summer, at a campsite, and for that a premium bag is not a better purchase — it is the same night’s sleep at several times the cost. It is also the sensible thing to buy in multiples for a family, for guests, or for children who will grow out of any bag you buy them.

Why it made the list: it removes the barrier. Cheap enough to buy four of, warm enough for a summer campsite, and with enough positive feedback over enough reviews that you know what you are getting. For festival camping, a spare bag in the car, or a first trip to find out whether you like this, it is the right answer.

The catch: the temperature claims on bags in this bracket are optimistic, and this one is no exception — treat it as a summer and mild-shoulder-season bag regardless of what the listing says, and do not take it anywhere near freezing. The fill is basic synthetic, so it is bulky, and the loft will degrade faster than a better bag’s. Construction is functional; expect the zip and the stitching to be the limits on its life. And because the rating is unreliable, pair it with a decent pad and warm clothing rather than trusting the number.

Who it is for: first-time campers, festivals, families buying several, spare bags, children, and anyone camping in summer at a campsite.

See the MalloMe sleeping bag on Amazon →

6. REDCAMP Cotton Flannel — best for car camping comfort

There is a case for a sleeping bag that behaves like bedding rather than equipment, and if you are sleeping ten feet from your car it is a strong one. This is a large rectangular bag — roughly 75 by 33 inches — lined with cotton flannel, which feels completely different against skin from the slippery synthetic lining of a technical bag. For anyone who finds nylon-lined bags clammy and unpleasant, that alone is the reason to buy it.

It has a two-way zip that can be set for right or left-hand use, which also means two of them can be joined into a double. Customer rating is 4.5 stars.

Why it made the list: comfort is a legitimate reason to choose a bag when weight and packed size are irrelevant, and flannel lining is truly nicer to sleep in than nylon. It is also a good bag for a guest room, a cabin, a caravan, or a child who does not like the feel of technical fabrics — the same reasoning that makes flannel sheets popular at home.

Where it falls short: cotton and a rectangular shape are both the wrong choices for cold and for carrying. It is heavy, it packs large, it has no hood, and the big opening at the top loses heat — this is a mild-weather bag and it should be treated as one. Cotton also absorbs moisture readily and dries slowly, which in a damp tent is a real disadvantage and in wet conditions is a problem. It is not a backpacking bag by any interpretation. And check the stated length against your height, because rectangular bags run shorter than they look.

Who it is for: car camping in mild weather, caravans and cabins, guest bedding, children who dislike technical fabrics, and anyone who wants to sleep in something that feels like a bed.

See the REDCAMP cotton flannel bag on Amazon →

Cheap upgrades that add real warmth

• A better sleeping pad. The single highest-value purchase in this whole area. R-value 4 or above for three-season use.
• A sleeping bag liner. A thin fleece or silk liner adds a few degrees, keeps the bag clean so you wash it far less often, and costs very little. Washing a liner is much easier than washing a down bag.
• A hat. Genuinely. A thin beanie is the cheapest warmth on this page.
• Dry sleep clothes kept in a dry bag and used only for sleeping, so you are never getting into the bag in something damp.
• A closed-cell foam pad to go under your inflatable, which adds R-value and gives you a backup if the inflatable fails.
• A hot water bottle filled before bed, placed between the thighs rather than at the feet.
• A large storage sack. If your bag did not come with one, buy one. Storing it compressed is what kills bags.

Care and washing

• Store it uncompressed, loose in a big mesh or cotton sack or hanging up. This is the difference between a bag lasting ten years and three.
• Air it after every trip before putting it away, even if it feels dry. Body moisture accumulates in the insulation.
• Use a liner and sleep in clean base layers so you rarely need to wash the bag at all. Body oils are what degrade insulation.
• Wash down in a front-loading machine on a gentle cycle with a dedicated down wash, never with ordinary detergent or fabric softener, and never in a top loader with an agitator.
• Dry down slowly on low heat with clean tennis balls to break up clumps, and expect it to take hours. A down bag that is put away damp will grow mold and lose loft permanently.
• Synthetic washes more easily on a gentle cycle with mild detergent, and dries faster, but still on low heat.
• Repair small tears immediately with fabric repair tape. A pinhole in a down bag leaks feathers and grows.

Where people go wrong

• Trusting the number on the bag. Add 10 to 15 degrees Fahrenheit to a limit rating, and be more skeptical still if no standard is quoted.
• Buying a warmer bag instead of a better pad. The ground takes more heat than the air.
• Using an uninsulated air mattress in cold weather. It can be colder than foam.
• Wearing thick clothing inside the bag. It compresses the insulation. One dry base layer, socks and a hat.
• Getting into the bag damp. From rain or from sweat. Change first.
• Storing it compressed. The most common way people ruin a good bag.
• Buying a rectangular bag for cold weather. No hood and a large opening means heat leaves at the top.
• Buying a backpacking bag for car camping. You are paying for weight savings you will never use.
• Using any stove, heater or lantern inside a tent. Carbon monoxide kills campers every year.

Frequently asked questions

What temperature rating do I need?

Work from the coldest night you realistically expect, then subtract about 10 to 15 degrees Fahrenheit from that to find the rating to buy — because the number on the bag is usually a survival limit rather than a comfort temperature. For summer camping in most of the US, a 30 to 40-degree bag is plenty. For three-season use including spring and autumn, 20 degrees is the standard answer. For winter or high altitude, 0 degrees or below, and a pad with an R-value of 5 or more.

Down or synthetic — which should I buy?

Down if you carry your kit and can keep it dry: it is far warmer for its weight and packs much smaller. Synthetic if there is any real chance of it getting wet, if you are car camping, or if you would rather not be careful with your gear: it keeps insulating when damp, dries faster and costs less. For most people camping a few times a year at a campsite, synthetic is the more practical choice and down is the nicer one.

Why am I cold in a bag rated below the temperature?

Most likely the pad. Insulation under you is compressed to almost nothing and the ground conducts heat away quickly, so a thin pad undoes a good bag. After that: the rating is probably a limit rather than a comfort figure; you may be in damp clothes or sleeping hungry; your hood may not be cinched; or the bag may be too large for you, leaving cold air to heat. Cold feet specifically usually means a compressed footbox or a pad that is too short.

Can two sleeping bags be zipped together?

Often, if they are the same model or the same series and you have one with a left zip and one with a right zip. Two joined bags are roomy and sociable, and in practice usually colder than two separate bags, because the join leaks and because one person inevitably ends up uncovered. A dedicated double bag is warmer than two joined singles.

How should I store a sleeping bag?

Loose and uncompressed — in the large mesh or cotton sack good bags come with, or hanging in a wardrobe, or flat under a bed. Keeping a bag in its compression sack between trips permanently flattens the insulation, and it is the single most common way people shorten the life of an expensive bag. The stuff sack is for carrying it, not for storing it.

How often should I wash it?

As rarely as you reasonably can, because washing is hard on insulation. Use a liner, sleep in clean dry base layers, and air the bag after every trip, and you may only need to wash it every few years. When you do, use a wash formulated for the insulation type, a front-loading machine on a gentle cycle, and dry it thoroughly on low heat — down in particular takes hours and must be completely dry before storage.

Is a sleeping bag safe for a baby or toddler?

An adult sleeping bag is not. Safe sleep guidance applies when camping as much as at home: infants sleep on their backs, on a firm flat surface, in their own space, with nothing loose over them. Purpose-made infant and toddler sleep systems for camping exist and are the right answer. For older children, a correctly sized child’s bag is warmer than an adult bag, because there is less air volume to heat.

Do sleeping bag liners actually work?

Yes, modestly and usefully. A fleece or silk liner adds a few degrees of warmth for very little weight and cost, and its more valuable function is keeping body oils and dirt out of the insulation, which means you wash the bag far less often and it lasts considerably longer. For the money it is the best accessory in this category after the pad.

Where we land

Before choosing a bag, check your sleeping pad. If its R-value is below about 3, buy a better pad first — it will do more for your warmth than any upgrade on this page.

Then, for most people, the Kelty Cosmic 20 is the bag: down warmth at a sensible price, in the rating that suits the most nights, PFAS-free and with recycled fabrics. If you sleep on your side or have found mummy bags unbearable, the NEMO Forte and its spoon shape is the one that will actually get used, with vents that extend its range.

On a budget, the Teton 20F/5F gets you real cold-weather capability cheaply, and the MalloMe is the sensible summer and family answer. For genuine cold or for anyone over six feet, the Coleman North Rim 0°F has both the rating and the cut. And if you are camping next to your car and want to sleep in something that feels like a bed, the REDCAMP flannel bag is a better purchase than a technical bag you find clammy.

Whichever you buy, add 10 to 15 degrees to the rating in your head, sleep in dry clothes and a hat, and store it uncompressed. Those three habits cover most of the difference between a good night and a long one.

For the rest of the trip, see our guides to the best camping tents, the best coolers, and the best portable power stations.

Also worth reading: our guide to the best hiking backpacks.

Also worth reading: our guide to the best camping stoves.

Also worth reading: our guide to the best camping chairs.

Also worth reading: our guide to the best hammocks.

Is this going to be a gift? See the best gifts for campers and hikers.

Also worth reading: our guide to the best air mattresses, including the two free fixes that stop guests sleeping badly on one.