Feathered Friends’s own description.
The Winter Wren is a favorite of backpackers, bikepackers, and big-wall climbers alike. The zippered arm holes of the Wren series allow you to wear your bag like an uber-warm parka when you're perched 10 pitches up, and the two-way center zip provides a convenient opening to remain tied in while you sleep.
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: 16 models. Lightest: Zpacks Solo Quilt at 11.8 oz (335 g). Median 1.39 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.
