(as of Jun 01, 2025 01:05:09 UTC – Details)
Remember the trapezoid from high school geometry? Turns out, this funky ol’ shape is ideal for helping sleeping bags retain heat. Our trapezoidal baffle construction is just one of the reasons the Cosmic Down is still our favorite three-season superstar. We also love the expanded natural-fit footbox for happier feet, zippered stash pocket and fully recycled fabrics and PFAS-free DWR treatment. The Cosmic Down is the total package.
Recycled Nylon and Recycled Polyester Taffeta
Imported
A KELTY CLASSIC: The cosmic 20 has long been a staple of Kelty’s backpacking lineup and a favorite of campers worldwide with 550 FP compressible down, silky soft fabrics, dual direction zippers, the cosmic is built for comfort at the campsite
PFAS FREE AS IT SHOULD BE: None of that toxic stuff here – Recycled nylon and polyester taffeta shell and liner fabrics to keep even more out of the landfill, finished with durable water repellent. Planet Earth approved
SUSTAINABLE + TRACEABLE DOWN: Did we mention all our down is 100% ethically sourced and traceable via RDS? Info on product tag to trace each specific batch of down, Kelty means business when it comes to sustainability.
1952: Since Eisenhower was in the oval, Kelty has been designing camping gear in sunny Colorado. A founding member of The Conservation Alliance, Kelty continues to lead the industry with quality gear for your outdoor shenanigans on or off the trail
THE DEETS: Each size up represents additional 6” of total length: Short fits sleepers up to 5’ 6”, Regular 6’, Long 6’ 6”. ISO limit rating 21 degrees, ISO extreme rating -11 degrees. Total weight about 2 lbs. 6 oz. (regular) stuffed size 13 x 7”
Customers say
Customers find the sleeping bag very warm, with one mentioning it reached 30 degrees at night, and they appreciate its comfort, with one noting they never woke up with a sore back. The bag is well-made and good for backpacking, though opinions on size and weight are mixed – while some find it packs down small and is lightweight, others say it’s too heavy for backpacking trips.
AI-generated from the text of customer reviews
Amazon Customer –
Good bag. No complaints
Awesome bag. Iâm 6â4â and 320 and itâs definitely tight but it will keep you warm around 20 degrees. I typically get hot when I sleep so I guess ff you donât then youâll probably want a 15 or zero degree bag. It packs down pretty small which is great for multiple day trips when I need to pack lots of other stuff
Thomas Tigue –
Cozy sleep
Excellent quality materials, construction and shape to assure an air tight fit when properly closed. Great double zipper thatâs easily zips from the outside or the inside of the bag (when your arms are basicly zipped inside the bag for warmth.). And boy does your body warm up quickly when properly zipped in this down bagâeven on windy, frigidly cold mornings. Impressed, in my mind, would be an understatement!
Kindle Customer –
Great cozy sleeping bag
Love this sleeping bag! I found it super cozy and light enough to backpack with. It is a bit bulky to fit in a backpack, but I made it work in a 43L pack. The zippers seem high quality and I was warm all night as it dipped into the low 40s with some wind. Highly recommend!
Shannon –
Good for backpacking!
Very warm, soft yet durable material. Highly recommended!
Satya –
Too Heavy for a backpacking trip
Its a 3 lb sleeping bag.. definitely not ultralight..
Kirsten –
Very Warm
When they say this is warmâ¦they mean it. I used it in 20 degree temps in a bare bones cabin (no heat or insulation) and I was hot in this (and Iâm normally always cold!) Itâs definitely snug though so if you donât like being confined; this isnât the bag for you.
stacey –
Great scout sleeping bag
Very nice and works great for my scout
Terry Farmer –
Be Aware
I love this bag, as it is very comfortable and warm, but… At 5’10”, regular length fit me fine. But at about 215lbs, it’s a tight fit. I like to sleep with my arms tucked in folded against my body, but unfortunately for me, my arms don’t like it. lol. I often wake up to stretch my arms out and get the blood circulating. If this is you, I suggest going with the roomier bag. I gave it 5 stars because all in all, it’s a great bag, just not the best for me. I have not stopped using it, but I may switch to the roomier bag. hope this is helpful.