Maker’s warranty: Guaranteed against manufacturer’s defects for an unlimited time; covers original owner; a storefront whose “sold by” and “fulfilled by” differ is not authorized; in-house repairs and down overfill. Western Mountaineering’s terms, read Oct 25, 2026
Western Mountaineering’s own description.
The HotSac vapor barrier liner keeps your sleeping bag dry and adds warmth on cold winter and expedition nights. Light, packable and simple.
The listed weight (4.5 oz) is not a plausible figure for sleeping bags & quilts. We are re-checking it with the maker and leave it out of every weight ranking until then.
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.
Sleeping bags rated 15 to 25°F ranked by maker-published weight: 21 models. Lightest: Therm-a-Rest Vesper 20°F/-6°C Down Quilt at 1.21 lb (550 g).
Sleeping bags and quilts rated 26 to 35°F ranked by maker-published weight: 15 models. Lightest: Zpacks Solo Quilt at 11.8 oz (335 g). Median 1.36 lb.
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.
