Kelty Cosmic Sleeping Bag
Best versatile down bag for budget conscious backpackers.
This reliable three-season bag balances warmth and weight for chilly backcountry nights. With a spacious footbox and efficient down insulation, it offers a comfortable sleep system that doesn't compromise on performance or sustainability.
$128.97
at
Steep and Cheap
More Cosmic options
Who it's for
- Budget-conscious backpackers seeking reliable warmth without a premium price tag.
- Campers frequently facing humid environments or unpredictable mountain weather.
- Side sleepers and restless movers who value a non-restrictive interior.
Who should skip it
- Ultralight hikers prioritizing minimal pack volume and maximum space efficiency.
- Cold sleepers who need a true sub-freezing performance bag.
- Long-distance trekkers struggling to fit all gear into a standard backpack.
Performance breakdown
Thermal Efficiency
Trapezoidal baffles and draft collars effectively trap heat for cold nights.
Weight-to-Warmth Ratio
The 550-fill down is reliable but adds bulk compared to premium alternatives.
Footbox Comfort
The expanded design prevents that restrictive feeling common in mummy bags.
Ventilation Versatility
Dual-zipper sliders make temperature regulation simple when conditions shift overnight.
Sustainability Profile
Recycled fabrics and PFAS-free finishes set a high standard for eco-conscious gear.
Packability
The heavier fill and shell materials require significant space in your pack.
Key Specs
Temperature Rating
20 degrees Fahrenheit
Insulation Type
550-fill duck down
Shape
Mummy
Weight
3.94 lbs
Max User Height
68 inches
Shell Material
20D 400T nylon
Lining Material
50D 300T polyester
Zipper Location
Right
Water Resistant
Yes
Season Rating
3-season
Know before you buy
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