Maker’s warranty: Limited lifetime warranty; electronic devices 2 years; covers original purchasers from authorized dealers; repair first; repair kits sold. Therm-a-Rest’s terms, read Oct 25, 2026
A 650-fill down sleeping bag from Therm-a-Rest rated 20°F / -6°C, with a shape and warmth that can be adjusted for three-season backpacking. It is sold in short, regular, long and wide sizes.
Figures with a source link to the page they were read from, with the date we checked it.How we get these figures →Wrong figure? Tell us
Against every one of the sleeping bags & quilts in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
Main models on the same shelf, compared with the Boost 650 20°F/-6°C Sleeping Bag on the makers’ published figures.
Western Mountaineering
Bison GWS
rated 60°F warmer
Western Mountaineering
Puma MF
rated 45°F warmer
Sea to Summit
Alpine Down Sleeping Bag
rated 40°F warmer
Not ranked: 25 with no published temperature rating.
See all 25 →Sleeping bags and quilts rated 26 to 35°F ranked by maker-published weight: 16 models. Lightest: Zpacks Solo Quilt at 11.8 oz (335 g). Median 1.39 lb.
Sleeping bags rated 15 to 25°F ranked by maker-published weight: 22 models. Lightest: Therm-a-Rest Vesper 20°F/-6°C Down Quilt at 1.21 lb (550 g).
How to read a temperature rating, why fill weight matters more than fill power, per-size prices, and what the makers publish for the Kelty Cosmic 20, the Western Mountaineering line, NEMO, Sea to Summit, Mountain Hardwear and Therm-a-Rest.