Best Sleeping Bags for Camping: 4 Single Bags by Comfort Rating

Camping sleeping bags compared

These are the makers’ published figures. The temperature column is the important one: ISO comfort and ISO limit figures, TETON’s survival-plus-comfort figures and Kelty’s name-only number are three different things and can’t be compared directly. Nobody slept in these bags for this article.

How to choose a camping sleeping bag

Read the rating type first

Makers publish three kinds of temperature figure:

• ISO comfort and limit. NEMO defines ISO comfort as the temperature at which a cold sleeper remains comfortable, and ISO limit as the lowest temperature at which a warm sleeper stays comfortable. If you sleep cold, plan around the comfort figure.
• Survival ratings. TETON says the ratings on its bags are survival temperature ratings: the coldest temperature the bag is designed to keep you alive in, without guaranteeing comfort. For comfort, TETON suggests adding 20 to 30 degrees to the listed rating, and it publishes comfort ranges for each bag.
• A number in the name. Some bags, like the Kelty Solstice 20, carry a number in the model name with no standardized comfort or limit figure on the maker’s page. Treat it as a label, not a test result.

Then match the comfort figure, not the name, to the coldest night you expect. The National Park Service suggests choosing a bag that matches the temperature and weather conditions for your location and time of year.

Budget for the pad as well

The bag only insulates what it surrounds. The National Park Service notes that a ground pad’s more important job is keeping moisture from accumulating beneath your body, which would otherwise rob you of heat. If you are cold on a good bag, the pad may be the weak link; our guide to whether a mattress or sleeping bag upgrade fixes a bad night first walks through that choice, and the R-value guide explains pad insulation ratings.

Check length and girth, not just “regular”

Each maker sizes differently. NEMO lists a “fits up to” height and shoulder, hip and knee girths; the Forte 20 regular fits up to 6 feet with a 62-inch shoulder girth. TETON and Kelty list overall dimensions instead: 90 by 39 inches for the Celsius XXL and 80 by 40 inches for the Solstice. Kelty describes the Solstice as far roomier than standard bags, and NEMO’s Spoon shape adds room at the knees and shoulders.

For car camping, packed size is a secondary concern

Packed size matters less when the car carries the load, but it still decides trunk space. NEMO lists the Disco 15 at 11.5 by 8.5 inches packed and the Forte 20 at 18 by 9.5 inches; Kelty lists the Solstice at 16.5 by 10.5 by 10.5 inches, and TETON lists the Celsius XXL at 21.5 by 14.75 by 14.75 inches.

1. NEMO Forte 20: best overall single bag for car camping

NEMO’s Forte is a three-season synthetic bag that NEMO lists for backpacking and car camping. The men’s 20°F regular carries an ISO comfort rating of 29°F and an ISO limit of 18°F, weighs 3 pounds 8 ounces packed and fits sleepers up to 6 feet. NEMO says its Classic Spoon shape gives more room at the knees and shoulders, which is the reason side sleepers look at it, and two-stage Thermo Gill zippered vents that NEMO says extend the usable temperature range. An oversized Blanket Fold draft collar is designed to block cold air or release excess warmth.

The fill is 100% recycled Zerofiber 800 synthetic insulation, and NEMO designs the bag to be fully recyclable at the end of its life through its Endless Promise program.

NEMO also sells a women’s Forte 20 with different numbers: an ISO comfort rating of 21°F and an ISO limit of 9°F in a regular that fits up to 5 feet 6 inches, at 3 pounds 15 ounces packed.

Buy it if you want standardized ratings, room to sleep on your side, and a bag that also works for an occasional backpacking trip.

Skip it if you are taller than 6 feet (choose a long size) or want a rectangular bag; the Solstice and Celsius are rectangles.

2. TETON Celsius XXL 0°F: best for big sleepers on cold nights

The Celsius XXL is a 90-by-39-inch rectangular bag with an integrated mummy hood, double-layer construction, a polyester flannel liner and full-length shoulder and zipper draft tubes. A two-way L-shaped zipper lets it open into a camp blanket. TETON’s Celsius line comes in 20°F, 0°F and -25°F versions, and TETON lists XXL item weights from 5.5 to 9.5 pounds across them.

Read the 0°F carefully. TETON calls it a survival rating and gives a comfort range of 25°F to 30°F for the 0°F version, so plan it as a near-freezing bag rather than a zero-degree one.

Buy it if you are tall or broad, sleep at drive-up sites on nights near freezing, and don’t mind a big stuff sack (TETON lists 21.5 by 14.75 by 14.75 inches).

Skip it if you need to carry it any distance; it is a car-only bag.

3. Kelty Solstice 20: best roomy rectangular bag

Kelty describes the Solstice as far roomier than standard bags. It is an oversized 40-by-80-inch rectangle with a soft-touch recycled 50D polyester pongee shell and liner, Thermapro Eco synthetic insulation in dual-layer offset quilt construction, a dual-slider locking zipper for venting, an internal pocket and an adjustable collar. Kelty lists a packed weight of 5 pounds 13 ounces.

The catch is the rating. The Solstice product page doesn’t publish an ISO comfort or limit figure, so the “20” in the name can’t be compared with NEMO’s numbers. Use it on nights well inside your own experience, or pair it with a warmer pad and layers.

Buy it if you toss and turn in a mummy bag and camp mostly in mild weather.

Skip it if you need a standardized rating to plan a cold trip; the NEMO bags publish one.

Search Amazon for the Kelty Solstice 20

4. NEMO Disco 15: best packable down bag

The Disco uses the same Spoon shape and Thermo Gill vents as the Forte but swaps in 650-fill-power down, which NEMO describes as hydrophobic, PFAS-free and RDS-certified. The men’s 15°F regular has an ISO comfort rating of 27°F and an ISO limit of 16°F, weighs 2 pounds 14 ounces packed and packs to 11.5 by 8.5 inches.

For a car camper, that small pack size is the reason to pay for down: it leaves trunk space and doubles as a backpacking bag.

Buy it if you want a lower ISO comfort figure than the men’s Forte in a smaller package, or you split time between car camping and backpacking.

Skip it if you only car camp and would rather put the difference toward a better pad.

Sharing a bag or sticking with a basic rectangle

Couples who would rather share should compare the double sleeping bag picks , which use different bags from this list. If you are weighing a familiar budget rectangle, our Coleman Brazos 20°F analysis explains what its rating does and doesn’t tell you (view the Coleman Brazos 20°F on Amazon ). For the rest of the sleep kit, see the car-camping checklist .

Sources

• NEMO Forte Men’s Synthetic Sleeping Bag
• NEMO Forte Women’s Synthetic Sleeping Bag
• NEMO Disco Men’s Down Sleeping Bag
• TETON Celsius Sleeping Bags
• Kelty Solstice 20 Sleeping Bag
• National Park Service: What to Bring

Specifications and temperature ratings were checked October 5, 2026. This is researched buyer analysis without hands-on testing; confirm the size, gender-specific version and temperature version on the seller’s page before ordering.

FAQ

Is a 20-degree sleeping bag warm enough at 20°F?

Usually not for comfort. The number in a bag’s name is often a limit or survival figure. NEMO’s Forte 20 has an ISO comfort rating of 29°F, and TETON, which uses survival ratings, suggests adding 20 to 30 degrees to its listed rating for comfort.

What is the difference between ISO comfort and ISO limit?

NEMO defines ISO comfort as the temperature at which a cold sleeper remains comfortable and ISO limit as the lowest temperature at which a warm sleeper stays comfortable. Plan around the comfort figure if you tend to sleep cold.

Do I need a sleeping pad with a sleeping bag?

Yes. The National Park Service says a ground pad cushions you and, more importantly, keeps moisture from accumulating beneath your body, which would rob you of heat.