Taffeta,Polyester Sierra Designs has made high performance backcountry camping gear and outdoor clothing - from ultralight tents, sleeping bags and jackets. Our products are all specifically designed to make getting outside, easier and more enjoyable. All Sierra design products are made with high-quality breathable top fabric which provides increased comfort. GLAMPERS, THIS ONE'S FOR YOU. We know you aren't always headed out on an alpine trek, and that's quite alright. Based on the Backcountry Bed, the Frontcountry Bed 20 delivers the same zipperless comfort, but in a more roomy shape with synthetic insulation. With an integrated sleeping pad sleeve to keep you comfy, the Frontcountry Bed 20 is your answer to living large in one spot.