Unlock the door to camping comforts with the highly versatile Master Key Sleeping Bag by Big Agnes. Rated to 25 degrees Fahrenheit, the Master Key feels right in most conditions from spring to fall. Its synthetic insulation stays warm when wet and keeps you nice and toasty in moist environments. A semi rectangular shape allows room for shifting and turning yet keeps the bag compact for camping convenience. Big Agnes designed this bag with a unique cordlock that lets you un cinch the hood in warmer weather, and the corner hand pockets double as shoulder wraparounds for better comfort in colder temperatures. There are internal loops for liners, and external loops for hanging the bag out to air. The Master Key also features a stash pocket, a mesh storage sack, and a nylon stuff sack.