The Western Mountaineering Puma Gore Windstopper Sleeping Bag is a incredibly warm sleeping bag for winter mountaineering. Built tough and rated down to -25°F, the 9" of loft is awesomely snug when high in the mountains. The Gore Windstopper™ fabric also helps increase warmth by preventing any wind from finding its way through the fabric. The 850+ fill goose down not only fills each baffle, but also the draft tube and collar for a proper nights sleep. As you drift into dream land inside this Made in the USA bag, think of the puma, the mountain lion, and envision yourself climbing to the top of the peak in the morning.