The 3 Season Coyote Brown USMC sleeping bag was made to be a lightweight compatible military sleeping bag for temperatures above 20°F. If combined with the full system of a Bivy, sleeping pad, and proper clothing they state use down to 5°F. The USMC Sleeping bag is very soft, lightweight, and comfortable. The Center Zip Sleeping bag is produced with an antimicrobial inner liner that helps to protect against the growth of microorganisms, baffle tubing to trap in body heat, and full head closures to keep you warm. The zipper is very easy to use to get in and out. USMC 3 Season Sleeping Bag Coyote Brown Size Long USA Made