The top of the line Mountain Hardwear Banshee is a winter mummy sleeping bag, featuring Q.Shield water repellent 800 fill down insulation, rated to 0F 18C. It features a waterproofbreathable Dry.Q Elite fabric shell for added performance in serious winter conditions. Q.Shield 800 fill down insulation with advanced treatment that resists heat robbing moisture and retains maximum loft in damp conditions. DryQ Elite Micro Rip 20D 100% nylon shell fabric is waterproof, breathable, windproof, durable and lightweight. 30D 100% nylon taffeta lining. Hidden baffle construction preserves waterproofness and durability. Laminated, double external zipper flaps keep water out. 5 baffle spacing keeps down insulation carefully controlled, for even, predictable loft. Six chamber hood design maintains even loft around the head for consistent warmth. Available in regular and long lengths, left zip only.