Kelty

Kelty Cosmic Synthetic Fill 40 Degree Backpacking Sleeping Bag with Compression Straps Compact and Lightweight 2022

4.6(89)
$86.32
sizeS

990+ bought in the past month

About this item

  • 20D Nylon Taffeta Shell, 50D Taffeta Liner, Cirroloft Synthetic Fill
  • Imported
  • 40 Degree Temp Rating, Regular Size: Fits sleepers up to 6ft, fill weight 24oz, total weight 2lbs 6oz, stuff size (non-compressed) 15x8 inches. Color: Duffel Bag Green/Smoke
  • Packability: Integrated compression stuff sack, coupled with the premium packability of the synthetic fill allow the Cosmic synthetic to reach minimalist standards of backpacking gear. Trail weight varies by temp rating, from 2lbs 6oz to 4lbs 11oz.
  • Insulation: Cirroloft synthetic insulation provides reliable warmth in cold and damp conditions, maintains loft for even coverage with no cold spots. Temperature ratings from 0 degrees to 40 degrees, to ensure your time on the trail is comfortable.
  • Tailored Fit: Natural fit spacious footbox gives more room to wiggle your toes, and length options range to fit sleepers 5’8” to 6’6”. A handy stash pocket on the exterior of the bag for your overnight goodies and essentials in the tent.
  • Kelty Craftsmanship: Kelty is synonymous with quality in the outdoor community. Kelty gear is built for play, and built to last. The Cosmic Synthetic bag is ready to be put through the ringer on the trail, campground, and everywhere in between.
$86.32

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Product details
BrandKelty
ColorGreen
Occupancy1 Person
ShapeMummy
SeasonsSummer
Temperature Rating40
Age Range (Description)Adult
SportCamping & Hiking
Special FeatureLightweight
MaterialBlend
Technical specifications
item_package_dimensions_l_x_w_x_h16 x 9 x 8 inches
package_weight1.2 Kilograms
item_dimensions_lxwxh9.1 x 6.1 x 15.5 inches
item_weight2.65 Pounds
brand_nameKelty
warranty_descriptionLimited
model_nameCosmic
colorGreen
materialBlend
suggested_usersmens
number_of_items1
manufacturerKelty
part_number35428820RR
model_year2020
styleRegular
included_componentsSleeping Bag, Stuff Sack
outer_material20D Nylon Taffeta
fill_material_typeSynthetic
sizeRegular (2022)
sport_typeCamping & Hiking
best_sellers_rank#72,925 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #165 in Camping Sleeping Bags
date_first_availableDecember 12, 2019

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Customer reviews

4.689 ratings
  1. 588%
  2. 413%
  3. 30%
  4. 20%
  5. 10%

Customers say

Customers find the sleeping bag to be of good quality.

★★★★★

Well made

BostonRunner15August 9, 2025✓ Verified purchase

Very comfortable and well made. Great entry level option. Read more

★★★★★

Great bag!

Colten M.June 8, 2025✓ Verified purchase

Love the color, great for spring summer and fall. Compacts pretty small. All around very satisfied. Good quality. Feels nice material. Read more

★★★★☆

Good lightweight bag for the price — but not roomy enough for bigger guys

HeatherOctober 20, 2025✓ Verified purchase

I bought two of these sleeping bags — one for myself (I’m 5’11”, 220 lbs, broad shoulders) and one for a family member to use when we go camping together. The quality is actually really nice for the price: the zippers glide smoothly, the material feels durable, and it packs down small with the included compression straps. However, the fit is definitely snug. I can technically zip it up, but once I’m inside, I feel a bit claustrophobic. I haven’t used a mummy-style bag since I was a kid, so maybe I’m not used to that “tapered” feeling anymore — but this one feels especially tight through the shoulders and chest. The description says it fits users up to 6 feet, but in my experience that’s optimistic unless you have a smaller or slimmer build. That said, for someone smaller (like my daughter), it’s perfect. She says it’s cozy and warm without being bulky. I decided to return one bag but kept the other for family use, since it’s such a solid value. Temperature-wise, this isn’t a winter bag, but for camping in northern Florida — where our winters are mild — I think it’ll perform well through the fall and maybe into early winter with a liner. It’s light, compact, and easy to roll up, which makes it ideal for car camping or short backpacking trips. Overall, I’d say this is a great buy if you’re not a larger-framed person or if you’re looking for an affordable, lightweight sleeping bag for mild weather. If you’re broad-shouldered or prefer more room to move, though, you might want to size up or look for a rectangular design instead. Read more

Review image 1Review image 2Review image 3
★★★★★

Light yet comfortable

mm1234January 31, 2026✓ Verified purchase

Very light, soft and comfortable for kids. Read more

★★★★★

Great value, met expectations

South CarolinianJanuary 6, 2026✓ Verified purchase

Exactly what I was looking for. I fit snugly as an average sized 6’2” man. Read more

★★★★★

Perfect cozy bag and not too heavy

Dave GeislerNovember 8, 2025✓ Verified purchase

Great lightweight bag, very comfortable. Lightweight and easy to hike with Read more

★★★★★

Excelente producto!!!

Oscar Javier Bautista GranadosOctober 27, 2025✓ Verified purchase

Material de muy buena calidad, cómodo y muy abrigado. Read more

★★★★★

Happy Camper

Iris+LunaOctober 18, 2024✓ Verified purchase

My first colder weather bag. I had my doubts on the low temp rating as I tend to run a little on the colder side but this bag kept me snuggly warm! I had even brought a small wool camp blanket for inside the bag just in case. The extra blanket ended up being more of a luxury than a need. Slept well in our tent through mid 30 nights with rain. I'm 5'7 and 180 so I opted for men's bag as it had a little more shoulder width than the women's. Glad I did, with it being a mummy style (which this was also my first) I am not used to the snug fit and like the ability to move about within the bag. Read more

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