This spacious double bag supplies camping comfort in a roomy bag with the option of two temperature ratings. Over-Under construction provides different amounts of insulation on the top and bottom flip bag over for more warmth or less, as conditions warrant. For sharing the load, bag zips apart to become two bags: one 30degF bag and one 40degF bag. Barrel shape provides generous interior volume, making it ideal for those who prefer a roomy fit. Durable ripstop nylon shell is abrasion- and tear-resistant for years of use. Hollow-core insulation delivers a balance of compressibility, warmth and durability continues to insulate when wet and dries quickly. Drawcord lets you adjust the neck opening easily in the dark. Draft collar and full-length draft tube backing zipper keep warmth in, cold out. Includes cotton storage bag.