Big Agnes Encampment 15 Degree Synthetic Regular Sleeping Bag Integrated pad sleeve. Never roll off your pad again Rectangular shape offers more room in foot box and shoulders Shell: Nylon rip-stop. WR surface treatment to repel water Lining: Soft, breathable nylon with stain resistant finish. 70 in. YKK #8 zipper. Mate together our left and right zip bags with same size zipper