Features:
"Finally a down booty that has the versatility to be used in the outdoors. Feathered Friends designed the booty so that you can wear the liners inside of your sleeping bag. The exterior shell can be used alone while hanging out around camp in the backcountry. The exterior fabric is breathable enough to help dry out your socks. Combine the shell and liners for cold weather use." Features water resistant durable shell fabric, drawcords at the ankles and cuff, Schoeller stretch waterproof/breathable shell rand, Toughtec waterproof soles, removable foam insoles, 800+ Fill power goose down, and liners have stretch waterproof/breathable bottoms.