Sea To Summit Spark Ultralight Down 40 Degree Sleeping Bag

The Spark Ultralight Mummy Sleeping Bag Series spans everything from an ultralight down-filled liner, to a mid-winter fast-and-light sleeping bag. Each model uses premium materials and no-frills design to provide cutting-edge performance. Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate wiggle room for the performance-oriented, backcountry user. Get the best out of your new Sleeping Bag click here for sleeping bag care instructions. ULTRA-DRY Down 850+ Loft 90% Down Cluster Premium Goose Down certified Responsible Down Standard (RDS) 10D shell and 7D liner materials help to achieve the incredible lightweight and compact packed size Includes lightweight Ultra-Sil compression bag and storage cell Zipper-length trimmed for gram-saving performance: 50AdegF, 40AdegF, and 28AdegF have 1/3-length zippers 18AdegF and 5AdegF have full-length side zippers that can be coupled to a Flame sleeping bag with a full-length zipper Baffle construction: 50AdegF and 40AdegF have sewn-through construction 28AdegF has baffles in the torso and sewn through in the leg area 18AdegF and 5AdegF are fully baffled Shape: 50AdegF , 40AdegF and 28AdegF - Contoured mummy 18AdegF and 5AdegF - Broader mummy BEST USE: Ultralight Backpacking PERFORMANCE: Warm Weather WEIGHT: 12oz | 340g COMPRESSED VOLUME: 1.5 liters LOWER TEMP RATING: 40degF | 5degC