9 Best Sleeping Bags of 2026

The Disco 15 is the bag we would point most campers to first because it pairs a real 15°F class rating with a cut that suits how people actually sleep. NEMO lists an ISO comfort rating of 27°F and an ISO limit of 16°F, filled with 1 lb 8 oz of 650 fill power RDS-certified down. The spoon shape measures 70 inches at the shoulders and 68 inches at the knees, so side sleepers can draw their legs up without fighting the bag. Two Thermo Gill vents on the chest open from inside or outside to dump heat, and the Blanket Fold draft collar seals the neck on cold nights. The hood and footbox use a waterproof fabric to resist tent condensation. The tradeoff is weight: the Regular Wide has a 2 lb 13 oz minimum weight and an 8.8 L compressed volume, heavier and bulkier than the 900 fill Therm-a-Rest Parsec. At $329.95 it costs far less than the premium ultralight bags here.

The Parsec 20F/-6C is the strongest all-round backpacking bag in this list. Therm-a-Rest fills it with 17 oz of 900 fill hydrophobic duck down that is RDS-certified and PFAS-free, and the Regular weighs 1 lb 13 oz (820 g). Its published EN ratings are 29°F comfort and 18°F limit, close to the NEMO Disco 15 at about 1 lb less. Zoned insulation puts more down on top and around the core, and the Toe-asis pocket in the footbox is a baffled spot to warm cold feet. A YKK anti-snag zipper, a cinchable hood, draft tubes along the zip and neck, and an internal stash pocket for a phone or water filter round it out. The shell and liner are 100% recycled 20D nylon. It packs to 7 by 10.5 inches and comes with compression and storage sacks. The catches are the price, $469.95, and a mummy girth of 62 inches at the shoulder, which restless side sleepers may find snug.

The Swallow UL 20 is the lightest and most premium bag here. Feathered Friends lists an average weight of 1 lb 10.6 oz (754 g) for the Regular, with 1 lb 0.8 oz of 950+ fill power goose down, all RDS-certified. The shell is Pertex Quantum Pro, a water-resistant and breathable fabric, with a DWR made without intentionally added PFAS, and the footbox lining uses Pertex Diamond Fuse to resist wear from hiker feet. The mummy shape measures 59 inches at the shoulder and 64 at the elbow, with a contoured hood and a generous draft tube behind a two-way #5 YKK separating zipper. Each bag is finished by hand in Seattle, which is why the company quotes 7 to 10 days to ship. The rating is 20°F, but Feathered Friends does not publish separate ISO comfort and limit numbers, so it is harder to compare directly. At $659 it is the most expensive choice, and the value score reflects that.

The Cosmic Down 20 is the value pick for campers who want down without paying premium prices. Kelty rates it at 20°F / -7°C and fills the Regular with 16.4 oz of 550 fill down, for a total weight of 2 lb 7 oz and a stuff sack of 8 by 13 inches. That is about 10 oz more than the Therm-a-Rest Parsec, but the price is $189.95, around $280 less. Kelty uses trapezoidal baffles to limit cold spots, a full draft tube and collar, dual locking sliders for venting, and an expanded footbox. The shell is recycled 20D nylon taffeta with a PFAS-free DWR. The bag comes in Short, Regular and Long, with the Short at $179.95. Kelty describes the shape as semi-rectangular, though the 62 inch shoulder girth on the Regular is close to a mummy cut. The 20°F number is a single rating, so do not expect it to feel comfortable right down to 20°F.

The Boost 650 answers a common complaint about mummy bags: they feel tight. It is a semi-rectangular bag with a second zipper, which Therm-a-Rest calls WarmZip, running down the center. Zip it up and the bag pulls the down closer around your body like a mummy, which the company says adds up to 10°F to the rating. EN ratings are 32°F comfort and 20°F limit. Arm holes let you read, eat or vent with your arms out, and a two-way YKK side zipper opens at the feet. The 650 fill hydrophobic down is zoned toward the top and core, and the shell and liner are recycled nylon with a PFAS-free DWR. The Regular weighs 2 lb 11 oz, and six sizes run from Short to Long Wide. The list price is $339.95 for the Regular, and it was on sale for $237.89 when we checked, which makes it a strong buy while the discount lasts.

The Lost Ranger 3N1 15° is really two bags. The outer bag is a roomy rectangle for warm nights, the inner bag is a hooded side-sleeper shape for cooler ones, and together they reach an ISO comfort of 27°F and an ISO limit of 15°F. On its own the inner bag is rated at 49°F comfort and 41°F limit. Both use 650 fill DownTek PFC-free down, with offset quilting so the stitch lines do not line up when layered. The outer bag has a pad sleeve and a Pad Cinch System that ties the bag to your sleeping pad, plus a Pillow Barn that holds a pillow or jacket in place. Big Agnes lists the Small at 2 lb 7 oz in total and says a pad is required for proper use. At $399.95 it costs more than a single 15°F bag like the NEMO Disco, so it makes sense if you camp across seasons and want one purchase to cover them.

The Forte 20 gives side sleepers NEMO's spoon shape with synthetic insulation instead of down. NEMO lists an ISO comfort rating of 29°F and an ISO limit of 18°F, which is close to the Disco 15 and the Parsec 20. The insulation is Zerofiber 800 PCR, a synthetic fill that keeps insulating when damp, which suits wet coastal trips, canoe camping and anyone who prefers to avoid down. The cut matches the Disco, with 70 inches at the shoulder and 68 at the knee. The cost of synthetic fill is weight and bulk: the 20°F Regular Wide has a minimum weight of 3 lb 10 oz and compresses to 11.9 L, the heaviest and bulkiest bag here. That makes it a better fit for car camping and short backpacking trips than long hikes. At $229.95 for the Regular Wide it is $100 less than the Disco 15, and a 35°F version starts at $169.95.

The Spark is for hikers who care more about weight than warmth. The 30°F Regular weighs 17.4 oz (493 g) with 9.3 oz of 850+ fill power goose down, and compresses to 4.5 L, the lightest and smallest bag on this list. Sea to Summit tests to ISO 23537 and lists a 30°F lower limit and a 39°F women's comfort rating, so it is a summer and early fall bag, not a shoulder season one. The down is RDS-certified with a non-PFAS Ultra-Dry Down treatment, and the 10D shell has a non-PFAS DWR with more water-resistant fabric at the hood and footbox. The 30°F version uses hybrid box baffles in the torso and sewn-through baffles in the legs. Sea to Summit also sells 45°F, 15°F and 0°F versions, from $349 for the 45°F. At $449, it costs less than the Swallow UL 20 but is rated 10°F warmer, which is why it sits lower on value.

The Cosmic Synthetic 20 is the cheapest way into a 20°F bag on this list. Kelty rates it at 20°F / -7°C and fills it with 31.4 oz of CirroLoft ECO synthetic insulation made from recycled fibers. The Regular weighs 2 lb 13 oz in total and packs into a 9.5 by 18 inch compression stuff sack, so it is heavier and much bulkier than the Cosmic Down 20, which costs $80 more. The shell is recycled 20D nylon with a PFAS-free DWR and the liner is a soft taffeta. Kelty includes the same draft collar, full-length draft tube, dual locking sliders, zippered stash pocket and roomy footbox as on its down bag. Synthetic fill keeps working when damp, which helps on humid or rainy trips. The 20°F figure is a single rating rather than ISO comfort and limit numbers, so plan on comfort a little above that. At $109.95 for the Regular it is a sensible first bag for car camping and short backpacking trips.