Eureka! Lone Pine 40-Degree Regular Length Semi-Rectangular Mummy Sleeping Bag, Summer Season, Brown Hybrid, semi-rectangular sleeping bag with a 40-degree F temperature rating features a comfort-focused shape that blends the thermal efficiency of a mummy bag with added wiggle room. Insulcore HQ synthetic insulation provides dependable warmth in all conditions while maintaining loft and durability and keeping the bag lightweight. Versatile sleeping bag features a full-length draft tube with anti-snag guard, insulated face baffle, internal pocket, and a full-length locking #5 zipper (both side and foot). Part of Eureka's patent-pending Camp Comfort Sleep System, the Stealth-Grip super-soft, suede-like fabric on the bottom shell helps keep the bag from shifting during the night. Regular-length sleeping bag weighs 2 pounds, 10 ounces, and packs down to 7.5 by 17 inches in the included stuff sack. Backed by a manufacturer's limited lifetime warranty.