Whether you are travelling above the arctic circle, or above 8000 meters, every aspect of the Bison StormShield™ is designed to keep you warm, and alive, in the coldest environments on Earth. Double interlocking draft tubes, weatherproof draft collar and oversized, differential cut hood create combine with our patented V-Block baffles, 42 ounces of 850+ fill power down, to give the Bison a massive 10 inches of heat trapping loft all sealed in a StormShield™ weatherproof shell. The Bison StormShield™ is the bag you can count on to keep you warm when you need absolutely need it. Made in the USA.