The Atom Sleeping Bag by Marmot is Marmot's light and fast bag. Temp Rating: 40 degrees F/ 5 degrees C Reg. Weight (US/Metric): 1 lb/453 grams Fits to: (Reg) 6' 0 in. / 183cm; (Long) 6' 6 in. / 198cm Shape: Mummy Zip option: Left Material: Shell: Pertex Quantam N-090 Ripstop Lining: Pertex Quantam N-090 Taffeta Insulation: 850+ Fill Goose Down Features: Certified 850+ Fill Goose Down Smaller and shorter zipper Velcro-free face muff Insulated draft tube Hood draw cord Zipper guards Side blocked below end of zipper Classic trapezodial foot box Ultralight stuff sack and storage sack included