Kelty

Kelty Cosmic 0 Down Mummy Sleeping Bag - 550 Fill Duck Down Winter Backpacking Sleeping Bag

4.5(78)
$274.95
size6

50+ bought in the past month

About this item

  • 20D Nylon Shell
  • Imported
  • TRAPEZOIDS, MAN: Turns out this funky shape is ideal for helping sleeping bags retain heat. Trapezoidal baffle construction improves our best selling Cosmic sleeping bag for 2021. Fan favorite and campsite staple with improved Thermal Efficiency
  • GET DOWN: Light, compressible, warm to boot; what’s not to love about Down Fill? The Cosmic features 550 fill Kelty treated DriDown insulation, with sustainably sourced materials that are easy to pack, use, dry, and keep your buns toasty.
  • ENTRY LEVEL VETERAN: Priced even lower for 2021, the Cosmic is more budget friendly than ever while retaining it’s well deserved reputation for a do-it-all backpacker’s slumber companion. First time campers and old timers rejoice
  • DUAL ZIPPERS: Two sliding, locking zippers with anti-snag draft tube - unzip from the bottom to stick a foot out and self-regulate heat while enjoying mummy-bag comfort. Zippered internal stash pocket for cell phone or headlamp
  • KELTY QUALITY: Good craftsmanship speaks for itself. Since 1952 Kelty has designed and manufactured quality, useful, and durable goods for the everyman (and woman) seeking to enjoy life outside. Headquarters in Colorado, USA
$274.95

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Product details
BrandKelty
ColorFired Brick/Red Ochre
Occupancy1 Person
ShapeMummy
SeasonsWinter
Age Range (Description)Adult
SportBackpacking, Camping and Hiking
MaterialNylon, Poly Taffeta
Fill MaterialDown
Product Dimensions72"L x 26"W
Technical specifications
brandKelty
colorFired Brick/Red Ochre
occupancy1 Person
shapeMummy
seasonsWinter
age_range_descriptionAdult
sportBackpacking, Camping and Hiking
materialNylon, Poly Taffeta
fill_materialDown
product_dimensions72"L x 26"W
closure_typeZipper
outer_materialNylon
fabric_type20D Nylon Shell
sizeStandard
maximum_height_recommendation6 Feet
upc727880873073
item_package_dimensions_l_x_w_x_h15 x 10 x 10 inches
package_weight2.04 Kilograms
item_dimensions_lxwxh72 x 26 x 3 inches
brand_nameKelty
warranty_descriptionKelty Standard Warranty
model_nameCosmic 0
suggested_usersunisex-adult
number_of_items1
manufacturerKelty
part_number35413521RR
model_year2021
styleRegular
included_componentsKelty Cosmic 0 Degree Down Sleeping Bag, Stuff sack
fill_material_typeDown
best_sellers_rank#361,539 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #630 in Camping Sleeping Bags
date_first_availableNovember 2, 2020

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Customer reviews

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

Customers say

Customers find the sleeping bag warm and of good quality, describing it as comfortable and cozy. Customers disagree on the fit, with some finding it tight.

★★★★★

Light weight and warm bag

JeffOctober 14, 2025✓ Verified purchase

Great sleeping bag. Spacious enough for me to roll onto my side in the sleeping bag. Not too constrictive for a mummy bag. Temperatures got down into the 30s and I actually had to unzip the bag because I was getting too hot. Read more

Review image 1
★★★★★

My second bag from this brand, and it's great!

IanApril 21, 2025✓ Verified purchase

Kept me warm and cozy this past winter. Only camped in weather down to high teens, low twenties, though. Ergonomics of zipper and hood are excellent. Toe box is the right size for me, 5' 7", US size 10 feet. Definitely only buy this if you're going winter camping, though. It'll be unnecessarily big and bulky to carry around in other seasons, not to mention too warm. Read more

★★★★★

Great for the price

Eileen TovarJuly 29, 2025✓ Verified purchase

Best sleeping bag I have ever owned. It keeps me super warm, almost too warm if its above 20 degrees. Great quality for the good price. Besides the zipper its easy to use. The sides can be tight for broad shoulders. Cons: quilting does move a little bit and you have to readjust it Feather come out of it Zipper can be difficult especially near the neck Read more

★★★★★

Great bag!

Jimmie d harrelsonJanuary 6, 2025✓ Verified purchase

Arrived promptly and was exactly as I had hoped. Kelty makes top shelf products at half the cost of other known and trusted brands. It is extremely warm and very very comfortable. So far I haven't even zipped it up. Would absolutely buy this again. Read more

★★★★☆

Warm

Ben HSeptember 23, 2025✓ Verified purchase

Warm enough. Some dead spots in the insulation but still stays warm. Read more

★★★★★

A slender, functional, sleeping bag with design elements that have been proven to work.

Ridge RunnerApril 19, 2025✓ Verified purchase

A good, solid, down sleeping bag. The design is much the same as early bags for some of the larger outdoor firms. The cut of the overall pattern is tight for an adult. However, this means it is thermally efficent. I am on the large side, being 6',4", approx 238lb. and rather wide shoulders at 48 to 50 inches. When I tried this bag in long, I felt snug, but with room to move if needed. As to the tearing and fragile sewing, well you need to take care of your gear. So far a good bag. I hope to review more at a later time after some use. Read more

★★★★★

Warm sleeping bag, love it!

CadaJuly 22, 2025✓ Verified purchase

Warm and cozy, love it! Read more

★★★★★

Great bag for the price

LatishaNovember 18, 2023✓ Verified purchase

Very surprised this doesn't have better reviews, it's a high quality feeling product that did it's job well. I used for winter camping conditions in the mountains on an elk hunt. The temperature dipped well below freezing and this bag kept me warm. It's the only bag that's ever kept my feet warm, I like the large foot space and extra insulation there. The long length was perfect for my height 6'4". *Note - Obviously be smart when camping in cold weather conditions! If the weather drops below freezing and you didn't bring a heat source, decent tent, thermal layers, wool socks and a pad to keep you off the ground, you will be cold even with a nice bag. Read more

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