The Chinook Everest Ice II Sleeping Bag is ideal for snowy, frosty winter adventures keeping you toasty down to -22 F / -30 C. It features heat-retaining Invista Thermolite Extreme insulation in three layers. The SnugHood design gives the hood a snug, low-bulk fit around your head. Oversized insulated draft tubes over the zipper and round the shoulders keep heat in and lock cold air out. The mummy shape keeps the heat close to you. So if your adventure is taking you somewhere very cold and snowy, this is the ideal sleeping bag.