Keep warm in this protective U.S. Military Surplus Patrol Sleeping Bag. Pre-tested by U.S. Troops and now ready for camping trips, overnight guests, and more. Olive Drab ripstop nylon outer Black or Olive Drab ripstop nylon interior Cold-fighting synthetic fill Modified rectangular shape Drawstring hood Bag can be used inside bivy bag or combined with heavy bag for cold weather use Troops shorter than 6' can use hood as a pillow if desired.