Kelty Cosmic 20 Down Sleeping Bag

Kelty Cosmic 20 down sleeping bag provides 20°F-rated warmth through 550-fill DriDown insulation — Kelty's proprietary hydrophobic down treatment that maintains loft and warmth performance when exposed to moisture. The Cosmic 20 is positioned as a three-season backpacking bag that covers spring, summer, and fall camping at elevations and latitudes where overnight temperatures regularly drop into the 20s, while remaining packable enough for multi-day backpacking trips.

DriDown vs. Standard Down

Standard down insulation collapses when wet and loses nearly all thermal insulation value until completely dry. DriDown applies a hydrophobic polymer treatment to the down clusters that causes water to bead rather than saturate the fill, maintaining 70-80% of loft and warmth when wet compared to untreated down. For backpacking in the Pacific Northwest, shoulder seasons in the Rockies, or any environment with frequent rain and condensation, DriDown provides a meaningful performance advantage over untreated down at the same fill power and weight.

• 550-fill DriDown — hydrophobic down treatment, maintains loft when damp
• 20°F temperature rating — covers three-season backpacking conditions
• Mummy cut — minimal dead air space for efficient warmth
• Compression stuff sack included — packable for backpacking use
• Draft collar — blocks cold air from entering at the shoulder

Sleeping Bag Temperature Ratings and Real-World Use

EN/ISO temperature ratings measure the minimum temperature at which a standard sleeper stays warm — a survival rating, not a comfort threshold for most people. Cold sleepers, women, and anyone sleeping in damp conditions should treat a 20°F bag as appropriate for camping in the 30s and above for comfortable sleep. Layer a sleeping bag liner or wear insulated camp clothing if sleeping at or near the stated temperature rating to maintain comfort.