Big Agnes Whiskey Park 0 (Thermolite Extra) Sleeping Bag Integrated pad sleeve. Never roll off your pad again Rectangular shape offers more room in foot box and shoulders Shell: Nylon. WR surface treatment to repel water Lining: Soft, breathable nylon with stain resistant finish. 2 x 62" YKK # 8 zippers allow matting as well as opening the bag so the top works like a comforter