Cosmic 20 vs Hamelin Synthetic Sleeping Bag
Cosmic 20 is the lighter of the two by 114 g (4.0 oz).
Hamelin Synthetic Sleeping Bag lists for $13.95 less at the manufacturer's price.
Per ounce carried, Hamelin Synthetic Sleeping Bag costs less: $4.09/oz against $4.87/oz.
Weights and prices are the manufacturer’s published figures. The best value in each row is highlighted.
| Cosmic 20 Kelty | Hamelin Synthetic Sleeping Bag Sea to Summit | |
|---|---|---|
| Weight | 39.0 oz | 43.0 oz |
| MSRP | $189.95 | $176.00 |
| 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 | $4.09/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 →Hamelin Synthetic Sleeping Bag
Hamelin Synthetic Sleeping Bag The Hamelin is a performance-oriented synthetic sleeping bag designed for comfort. Built for the backcountry, it is at home in a range of climates and conditions – especially when things turn damp. The weight-efficient Contour shape offers room to move in any sleeping position, while Layers of Revive Loft are strategically placed to maximise insulation value.
Full specs and prices for the Hamelin Synthetic Sleeping Bag →