Description of Marmot Hydrogen 30°F Regular Sleeping Bag The Hydrogen delivers enough warmth for ultra-light cool-weather climbs and backcountry excursions, while still weighing in at a wispy one pound for light and fast climbs and hikes. Features: 30°F | -1°C Weight: 1 lb 9 ozs / 709 g Main Material: LightForce N-120R DWR Lining Material: LightForce P-100 DWR Taffeta Insulation Material: 850+ Goose Down Size for stature: 183 cm Size on shoulder: 157 cm Size on hip: 147 cm Size on foot: 102 cm Certified 850+ Fill Goose Down The Best Weight to Warmth Down in the Market; Independently Tested and Certified by International Down and Feather Laboratory in Salt Lake City, Utah. Retested at Fill Time in Santa Rosa to Ensure 850+ Fill Power Every Time. If the Down Does Not Meet Marmot's In-House Test, They Send It Back Classic Trapezoidal Foot Box For More Foot Room Full-length Zipper Hood Draw Cord Positioned for Easy Access Insulated Draft Tube Eliminates Cold Leaks Through the Zipper Stretch Tricot Baffles Provide Ultimate Strength, Durability and Bag Life Stuff and Storage Sack Included Store and Pack Just Like Your Sleeping Bag Velcro®-free Face Muff Keeps the Drawcord and Zipper Away from Your Face Zipper Guards Help Repel Biting Zipper Coils