Cosmic 20 vs Trek Down Sleeping Bag
Cosmic 20 is the lighter of the two by 91 g (3.2 oz).
Cosmic 20 lists for $174.05 less at the manufacturer's price.
Per ounce carried, Cosmic 20 costs less: $4.87/oz against $8.62/oz.
Weights and prices are the manufacturer’s published figures. The best value in each row is highlighted.
| Cosmic 20 Kelty | Trek Down Sleeping Bag Sea to Summit | |
|---|---|---|
| Weight | 39.0 oz | 42.2 oz |
| MSRP | $189.95 | $364.00 |
| Temperature rating | 20°F / -7°C — manufacturer's stated rating (Kelty), not independently tested; the maker publishes no ISO 23537 or EN 13537 figure | 30 °f | -1 °c (ISO 23537, tested by Sea to Summit) |
| Price per ounce | $4.87/oz | $8.62/oz |
| Retailers | 1 | 2 |
Cosmic 20
Kelty's Cosmic Down 20 is a 550-fill-power down mummy bag in a semi-rectangular cut, 1106 g in the Regular length. Fill power measures the loft of a given mass of down: 550 is a modest figure, so the bag reaches its rating with more down mass and therefore more weight than an 800-fill bag would. Kelty publishes a 20 F rating as its own number and does not publish ISO 23537 comfort or limit figures, so it cannot be compared directly with bags that do.
Full specs and prices for the Cosmic 20 →Trek Down Sleeping Bag
Trek Down Sleeping Bag If you've ever wished for a less-constrictive sleeping bag that keeps you comfortable in a variety of cool-to-warm conditions, the Trek may become your go-to bag.
Full specs and prices for the Trek Down Sleeping Bag →