DESC: Every Big Agnes Bag requires a pad to provide the insulation on the bottom; this style requires a 20 wide rectangular pad. ; Integrated pad sleeve so you won't ever roll off your pad again. Rectangular shape offers more room in foot box and shoulders. Cotton storage sack & nylon stuff sack included. Built-in pillow pocket holds a fleece or Big Agnes Pillow. Interior fabric loops for sleeping bag liners. YKK #8 zippers are able to mate together any of the left and right zip bags with the same size zipper. No-draft collar seals around your 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. Shell: Nylon rip-stop with a DWR surface treatment to repel water. Interior lining: Soft and breathable nylon with a stain-resistant finish. Pad sleeve: Nylon rip-stop with a DWR surface treatment to repel water. Fill: Climashield HL. A-Flex: ; A synthetic construction technique which combines layers of fle...