Ultralight Sleeping Bag
Sierra Designs Mobile Mummy
$270, 2 lbs. 8 oz. (men’s regular)
Sizes: men’s regular and long ($290) and women’s ($300)
Stepping out of my tent on our first morning in Arizona’s Aravaipa Canyon in the first week of April, I was greeted by an air temperature barely above freezing and a steady wind sailing through our camp at about 20 to 30 miles per hour. So I reacted in the only way that made sense: I wore my sleeping bag in camp. And I could do that and walk around easily (while my friends assumed postures of cold discomfort wearing their down jackets outside—or simply stayed in their tent) because my bag was the Sierra Designs Mobile Mummy 15° F/-9° C.