Marmot Helium 15 Degree Down Sleeping Bag - Fall 2015 850+ Fill Power Goose Down Temperature Rating: 15&deg; F / -9&deg; C Materials: 20 Denier 100% Nylon Ripstop DwR 1.2 oz/yd Lining: 30 Denier 100% Nylon 1.3 oz/yd Weight: 2lbs 6oz (1077g)