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The Atom 40-degree sleeping bag from Marmot is ultra-light and remarkably compressible so it's perfect for minimalists or fast and light outdoor adventurers. Silky smooth and totally comfortable, it's just as right for casual outings as it is for your epics.

• 850-fill goose down has insulative properties that give it the best warmth-to-weight ratio you can find, and the compressibility allows the bag to pack down to the size of a loaf of bread
• DWR-treated LightForce nylon shell and polyester lining repel moisture while being silky smooth and comfortable
• Heat loss is prevented around the neck and head with a passive collar and Nautilus hood
• Hood muff creates a face gasket that keeps hood drawcords away and makes the face area Velcro free for added comfort
• Insulated draft tube eliminates cold spots; zipper guards prevent draft tube fabric from catching in the zipper
• Full-length zipper makes for easy ins and outs
• Stuff sack and storage sack included

• Temperature rating: +40 degrees Fahrenheit
• Insulation: 850-fill goose down
• Total weight: 1 pound (Regular), 1 lb 8 oz (Long)
• Fill weight: 8 ounces (Regular), 10 ounces (Long)
• Shoulder / hip / foot girth: 62 / 58 / 40 inches (Regular), 64 / 60 / 42 (Long)
• Fits to: 6 feet (Regular), 6 ft 6 in (Long)
• Shell material: nylon