Kelty
Cosmic Ultra 20 Degree
Best lightweight sleeping bag for budget conscious backpackers.
Designed specifically for the female anatomy, this lightweight mummy bag prioritizes thermal efficiency through advanced trapezoidal baffle construction. It features high-loft water-repellent down insulation, ensuring warmth even in damp conditions. The tailored fit includes a wider hip area and narrower shoulders, with targeted insulation in the upper body and footbox to combat cold spots. A durable, soft-touch nylon shell provides long-lasting performance, while the anti-snag zipper and spacious footbox enhance overall comfort. This bag balances technical performance with thoughtful design, making it a reliable choice for three-season backpacking adventures where weight and warmth are critical.
$269.95
More Cosmic Options
Cosmic 20
$159.95
Cosmic Down 20
$189.95
Cosmic Synthetic 0 Degree
$139.95
Cosmic 20 Degree Sleeping Bag
$159.95
Cosmic
$314.95
Cosmic 20 Sleeping Bag (Long)
$109.95
Cosmic Synthetic 20 Degree
$119.95
Cosmic 40
$119.95
Cosmic Synthetic 20
$109.95
Cosmic 20 Sleeping Bag
$118.22
Cosmic Ultra 0°F Sleeping Bag
$219.95
Cosmic Ultra 800 DriDown Sleeping Bag
$184.48
Cosmic 0 Synthetic Sleeping Bag
$129.95
Cosmic 20 Sleeping Bag
$118.22
Cosmic Ultra 0°F
$245.97
Kelty Cosmic 20
$169.99
Kelty Cosmic Synthetic 0 Degree Sleeping Bag
$166.00
Kelty Cosmic Down 20
$189.95
Kelty Cosmic Ultra 0
$369.95
Cosmic Synthetic 40 Degree
$99.95
Cosmic Synthetic 20
$109.95
Owner Satisfaction
4.6
/ 5
Category Rank
333
/ 2020
#333 in Sleeping Bags
Price vs Category Average
+61%
Above average
Temperature Rating
20.0
/ °F
Who it's for
- Backpackers prioritizing lightweight gear and warmth
- Hikers and campers with limited backpack space
- Budget-conscious adventurers seeking quality down insulation
Who should skip it
- Rugged campers needing maximum gear resilience
- Campers who prefer spacious sleeping bag interiors
- Users in extremely humid or wet environments
Key Specs
Temperature Rating
20.0°F
ISO Comfort Rating
25.0°F
ISO Limit Rating
13.0°F
ISO Extreme Rating
-21.0°F
Weight
2.95 lbs
Fill Weight
24.69 oz
Max User Height
67.72 inches
Insulation Type
800 fill DriDown
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$270