The Original Bed Buddy? Doctor Recommended Moist Heat Without Adding Water Provides Natural Moist Heat Use it Cold or Hot Reusable Stays Heated for up to an hour One Size Fits All Contains 100% Natural Materials Easy and Safe to Use as Directed The Original Bed Buddy? Back Wrap is easy to use and provides deep penetrating heat for nagging lower back pain and other aches and pains. Can also be used as a Cold Pack. The quick adjusting strap and hook-and-loop closure allow for secure and comfortable placement in various positions on the body.