"Full Description:\nIf you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you. Filled with RDS-certified 850+ fillpower goose down treated with a non-PFC Ultra-Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super-breathable 10 denier liner fabric, while a 10D shell with a non-PFC DWR plus a highly water repellent hood and footbox fabric shed wind and condensation. The full-length zipper model can be zipped to an equivalent Women's Spark for comfort that couples can share\n\nFeatures:\n\u003cul>\n\u003cli>RDS-certified, 850+ fill-power goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance\u003c/li>\n\u003cli>10-denier shell with a non-PFAS durable water repellent (DWR) keeps the hood and footbox highly water-resistant\u003c/li>\n\u003cli>Ultralight, breathable 10-denier nylon liner\u003c/li>\n\u003cli>Constructed with a technical hood and zipper draft tube to retain warmth\u003c/li>\n\u003cli>Technical hood, anatomic footbox and an ergonomic mummy shape—ultralight doesn't have to mean ultratight\u003c/li>\n\u003cli>Full box baffles for maximum warmth\u003c/li>\n\u003cli>YKK #5 zipper with zipper plow provides reliable, snag-free operation\u003c/li>\n\u003cli>Full-length side zipper can be zipped to a compatible women's Spark (not included) for comfort that couples can share\u003c/li>\n\u003cli>Sea to Summit Guarantee is offered for the Lifetime of this product\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>Tested Comfort: 29 degrees (F) - ISO\u003c/li>\n\u003cli>Down certified to the Responsible Down Standard (RDS)\u003c/li>\n\u003cli>Shell: 10-denier nylon\u003c/li>\n\u003cli>Fill: 850+ fill-power goose down\u003c/li>\n\u003cli>Lining: 10-denier nylon\u003c/li>\n\u003cli>Weight: Regular: 1 lb. 9.7 oz., Long: 1 lb. 11.7 oz., Double: 3 lb. 6.4 oz.\u003c/li>\n\u003cli>Fill Weight: Regular: 1 lb. 0.9 oz., Long: 1 lb. 3 oz., Double: 2 lb. 2.7 oz.\u003c/li>\n\u003cli>Fits Up To (in.): Regular: 73 inches, Long: 78 inches, Double: 78 inches\u003c/li>\n\u003cli>Shoulder Girth (in.): Regular: 61 inches, Long: 65 inches, Double: 105 inches\u003c/li>\n\u003cli>Hip Girth (in.): Regular: 61 inches, Long: 65 inches, Double: 105 inches\u003c/li>\n\u003cli>Stuff Sack Volume: Regular: 13 liters, Long: 13 liters, Double: 20 liters\u003c/li>\n\u003cli>Compressed Volume: Regular: 6.8 liters, Long: 7.6 liters, Double: 14.3 liters\u003c/li>\n\u003cli>Tested Lower Limit: 15 degrees (F) - ISO\u003c/li>\n\u003cli>Sleeping Bag Shape: Mummy\u003c/li>\n\u003cli>Temperature Rating (C): -9 degrees (C)\u003c/li>\n\u003cli>Temperature Rating (F): 15 degrees (F)\u003c/li>\n\u003cli>Water-Resistant Down: Yes\u003c/li>\n\u003cli>Zipper Location: Left\u003c/li>\n\u003cli>Sleeping Capacity: 1-person\u003c/li>\n\u003cli>Ultralight: Yes\u003c/li>\n\u003cli>Best Use: Backpacking\u003c/li>\n\u003cli>Sustainability\u003c/li>\n\u003cli>Gender: Unisex\u003c/li>\n\u003cli>Insulation Type: Down\u003c/li>\n\u003c/ul>\n"