Riff Down is the lighter of the two by 57 g (2.0 oz).
Cosmic Down 20 Sleeping Bag
Riff Down
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Weights and prices are the manufacturer’s published figures. The lower weight and the higher R-value are highlighted.
| Cosmic Down 20 Sleeping Bag Kelty | Riff Down NEMO | |
|---|---|---|
| Weight | 39.0 oz | 37.0 oz |
| MSRP | $189.95 | — |
| Temperature rating | 20°F / -7°C — manufacturer's stated rating (Kelty), not independently tested; the maker publishes no ISO 23537 or EN 13537 figure | 15°F / -9°C (manufacturer rating, not independently ISO 23537 / EN 13537 tested) |
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“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 Down 20 Sleeping Bag →
Source not recorded.
“The NEMO Riff is NEMO's down backpacking bag on the signature Spoon shape, with 800 fill power hydrophobic down and Thermo Gill vents that let side sleepers dial in temperature. The 15-degree men's model is a three-season-plus down bag.”Full specs and prices for the Riff Down →