REI Siesta 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. Barrel shape provides generous interior voume, 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 plus, it continues to insulate when wet and dries quickly. Zip-around design lets you open up bag for use as a quilt. Drawcord lets you adjust neck opening easily in the dark. Draft collar and full-length draft tube backing zipper keep warmth in, cold out. Includes cotton storage bag.