The Big Agnes Encampment sleeping bag offers warmth to 15 degrees and protection from moisture with INTEGRITY; Short Staple synthetic insulation with 97% recycled content; feels as warm and soft as down. The Encampment includes the company's popular integrated pad sleeve system which is different than the traditional sleeping bag on top of a sleeping pad. Instead, they unite the two. With Big Agnes, the pad slides into an integrated sleeve on the bottom of the bag, and the top two-thirds of the bag is insulated in the traditional style. When insulation material is compressed under your body, it loses most of its ability to insulate. They eliminate the unnecessary bottom insulation and replace it with a sleeve to accommodate the pad which provides the insulation. Requires a 20 in. wide rectangular pad (sold separately).No-draft collar seals around neck to keep cold air from sneaking in.No-draft wedge insulates the connection between the bag and pad.No-draft zipper tube insulates along the length of the zipper.Requires a 20 in. wide rectangular pad (sold separately).A-Flex: A synthetic construction technique which combines layers of 'flexed' insulation with smaller 'anchor' pieces to connect them. The 'flexed' layers increase loft and trapped air space and the 'anchors' maximize heat containment by eliminating gaps and creating more air pockets.Built in pillow pocket holds a pillow.Interior fabric loops for sleeping bag liners.Cotton storage sack & nylon stuff sack included.Pad sleeve: Nylon rip-stop. WR surface treatment to repel water..Import.