The Western Mountaineering Lynx MF -10 Degree Sleeping Bag is a down sleeping bag for cold weather in the backcountry. Venture into the outdoors in the early spring, on foot or searching for the best ski spots before the snow melts and this medium sized cat will take care of the warmth. Filled with 32oz of 850+ fill power down, you're getting a 9" loft to surround your whole body with warmth as you sleep. Rated to -10°F, but only weighing in at 3lbs, 2oz, it won't break your back when hiking through the melting snow. A MicroLite XP™ shell protects the down inside and the draft tube and collar prevent drafts from leaking there way through.