Description of Marmot Atom 40°F Regular Sleeping Bag The Atom’s ultra-light design and our highest quality down have given it cult status among alpinists as a bivvy bag on extreme climbs, but its comfortable, silky fabric make it a great bag for warm-weather bivvies on casual summer road trips as well. Features: 40°F | 4°C Left Hand zipper Weight: 1 lb 5 ozs / 595 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 Sewn-Through Baffles Makes the Overall Weight Lighter 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