Features of the Marmot Paiju 10 Sleeping Bag Pertex Quantum Air water-resistant and breathable fabric Features improved air permeability; Offers protection from wind and improves the efficiency of Insulation for 4-season use Water-resistant Down Defender provides lightweight warmth and an extra level of moisture protection and retains critical loft of the 800-fill-power-down Insulation; Waterproof thread prevents moisture from coming through seams Smooth, curved baffles reduce down shifting; Cinchable draft collar for extra warmth Full-length locking YKK two-way zipper with zip-guard slider Seam-taped roll-top stuff sack for easy access and transport EN tested Fabric Details Insulation Material: 800 Fill Power, Goose Down