Product DescriptionThe ZERO Mummy sleeping bag is built for cold-weather and high-altitude expeditions. It uses 850+ fill-power down, a durable water-resistant shell, hood design with pull-cords, and shoulder/zipper baffles to lock in warmth. Comfort rated around 14 AdegF and comfort limit 0 AdegF making it a serious mountaineering option.Key FeaturesExceptional Warmth & Comfort: Hooded design reduces heat loss and keeps your head warm, with shoulder and zipper baffles to block cold air and maintain core temperature. Adjustable collar and hood pull-strings help trap body heat for comfort in temperatures below 32AdegF (0AdegC).Functional Design: Includes an internal pocket near the collar for essentials like a phone or flashlight, plus four small internal pouches designed to hold heat warmers for added warmth when needed.Premium Construction: Built with durable, water-resistant materials and insulated with high-quality white duck down for an exceptional warmth-to-weight ratio. Responsibly sourced and certified to the RDS (Responsible Down Standard).Compact & Portable: Packs down to approximately 13 x 7 inches in the included ripstop nylon compression sack, conserving valuable pack space, and comes with a mesh storage sack for proper long-term care.Ideal for Various Conditions: Designed for mild to cold weather adventures and high-performance mountaineering, offering outstanding warmth compared to other sleeping bags in its class and price point.Technical SpecsBest UseBackpacking/Camping/MountaineeringTemperature Rating (F/C)Comfort: 14 F/ -10 CComfort Limit: 0 F/ -18 CWeightShort: 2 lb. 3 oz. (1000 g)Regular: 2 lb. 10 oz. (1200 g)Long: 3 lbs. (1400 g)Zipper LocationRightMaterial10D taffeta nylonInsulation TypeWhite duck downFill850+ fill power (RDS certified)Short: 570 g of down fillRegular: 750 g of down fillLong: 1020 g of down fillShapeMummyFit (User Recommended Height)Short: Fits up to 5' 6" (168 cm)Regular: Fits up to 6' (183 cm)Long: Fits up to 6' 6" (198 cm)Dimensions (L x shoulder/hip width)Short: 73 x 31/18 inchesRegular: 80 x 31/20 inchesLong: 87 x 31/20 inchesGenderUnisexShipping Time: Orders processed and shipped within 24-48 business hours of placement date. Shipped from Arizona. Delivered in 2-6 days with FREE GROUND SHIPPING on all orders over $99, that ship within the 48 contiguous United States. Additional shipping options available.