The Blizzard Down sleeping bags are individually optimized for the respective temperature area the bags are intended for. A down bag normally has a wider range of use regarding temperatures compared to a fiber filled bag. It is more comfortable when the temperature is rising compared to a fiber filled bag which easily can feel “too warm”. The Blizzard sleeping bags also have our unique inside closing of the hood opening and opening for both arms. The zipper is positioned away from the ground. This reduces heat loss and the zipper is more accessible for opening and closing.