The Chinook Everest Peak II Sleeping Bag is ideal for adventures in colder climes keeping you toasty down to -5 F / -20 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 bag can even been zipped to another compatible sleeping bag and comes with a choice of left or right zippers. The mummy shape keeps the heat close to you. So if your adventure is taking you somewhere cold this is the ideal sleeping bag.