Hyperlite Mountain Gear 20-Degree Mummy Bag vs Kelty Cosmic 20 Down Sleeping Bag
20-Degree Mummy Bag is the lighter of the two by 293 g (10.3 oz).
Cosmic 20 Down Sleeping Bag lists for $490.05 less at the manufacturer's price.
Per ounce carried, Cosmic 20 Down Sleeping Bag costs less: $4.15/oz against $23.03/oz.
Where to buy
20-Degree Mummy Bag
Cosmic 20 Down Sleeping Bag
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Weights and prices are the manufacturer’s published figures. The best value in each row is highlighted.
| 20-Degree Mummy Bag Hyperlite Mountain Gear | Cosmic 20 Down Sleeping Bag Kelty | |
|---|---|---|
| Weight | 28.2 oz | 38.6 oz |
| MSRP | $650.00 | $159.95 |
| Temperature rating | 20°F (manufacturer rating, stated in the model name) (manufacturer claim) | 20°F / -7°C — manufacturer's stated rating (Kelty), not independently tested; the maker publishes no ISO 23537 or EN 13537 figure |
| Price per ounce | $23.03/oz | $4.15/oz |
| Retailers | 1 | 1 |
Which one to choose
- Choose the Hyperlite Mountain Gear 20-Degree Mummy Bag if every ounce counts — 28.2 oz against 38.6 oz.
- Choose the Kelty Cosmic 20 Down Sleeping Bag if value per ounce carried decides it ($4.15/oz against $23.03/oz).
Questions this comparison answers
- Is the Hyperlite Mountain Gear 20-Degree Mummy Bag lighter than the Kelty Cosmic 20 Down Sleeping Bag?
- 20-Degree Mummy Bag is the lighter of the two by 293 g (10.3 oz).
- Which has the lower list price, the Hyperlite Mountain Gear 20-Degree Mummy Bag or the Kelty Cosmic 20 Down Sleeping Bag?
- Cosmic 20 Down Sleeping Bag lists for $490.05 less in manufacturer list price (MSRP).
- Which is better value per ounce, the Hyperlite Mountain Gear 20-Degree Mummy Bag or the Kelty Cosmic 20 Down Sleeping Bag?
- Per ounce carried, Cosmic 20 Down Sleeping Bag costs less: $4.15/oz against $23.03/oz of manufacturer list price (MSRP).
20-Degree Mummy Bag
Wrap up your day with the 20-Degree Mummy Bag, sewn up to perfection for exceptional warmth, compressibility, and comfort without unnecessary bulk. Premium 1000 fill power grey goose down treated with a DWR finish provides maximum loft and reliable insulation, while 3-dimensional baffles allow the bag to fully loft to 2. 75 inches for efficient heat retention.
Full specs and prices for the 20-Degree Mummy Bag →Cosmic 20 Down Sleeping Bag
The Cosmic 20 is Kelty long-running value down bag, delivering real 20-degree down warmth at a price that undercuts premium brands. Water-resistant DriDown keeps loft when damp, and the mummy cut with draft tube seals in heat for three-season backpacking.
Full specs and prices for the Cosmic 20 Down Sleeping Bag →