Divide Series bags reduce weight and packed size but retain comfort. They're roomy and performance oriented, with high quality down and lightweight shell fabric. These are the bags for gram-counters and those who prefer the tapered fit of a mummy bag. Features Integrated pad sleeve. Never roll off your pad again Mummy shape decreases weight & packed size Recycled mesh storage sack & nylon stuff sack included. Built in pillow pocket holds a fleece or Big Agnes Pillow Interior fabric loops for sleeping bag liners 60" YKK #5 zipper.Mate together our left and right zip bags with same size zipper. 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. Shell and Pad sleeve: Toray fabric. Ultralight, high thread-count, rip-stop nylon with Kudos FP super durable water repellency technology. Lining: Nylon taffeta