With its compressible synthetic fill and weight-saving mummy-shape, the Big Agnes Shoestring SL 22 Degree sleeping bag offers excellent 3-season backpacking performance at an affordable price. The Shoestring SL 22 Degree bag is insulated with Pinneco Core synthetic fill. Synthetic insulation dries much faster than down and provides warmth even when wet. This is particularly important if you'll be backpacking or camping in wet weather or humid climates. The Shoestring SL 22 Degree bag's nylon shell fabric has a surface treatment that further helps to repel water. A number of other design features bolster the warmth and comfort of the fully-insulated, vertically-baffled Shoestring SL 22 Degree bag. An insulated ergonomic hood, a draft tube located along the length of the zipper, and an insulated neck yoke lock in heat and keep out cold air. Integrated connection loops enable you to use the bag with a liner (sold separately). Each Big Agnes Shoestring SL 22 Degree sleeping bag includes a nylon stuff sack and a mesh storage sack.