This is the pain-relieving system that uses super-cooled ice packs to ease discomfort from everyday aches, pains, and minor injuries in just three minutes. Using a proprietary supercooling gel developed by a NASA Engineer, the reusable 4 3/4 hexagonal cryo packs can be used alone or in multiple configurations to provide effective, targeted treatment. After being super-cooled in the freezer, the cryo pack’s patented design allows you to effortlessly shape and contour to target any part of the body—including the back, knees, hips, legs, shoulders, ankles and more. Included elastic straps provide hands-free convenience and unrestricted mobility for treatment whether seated, reclined, or in motion. Includes three packs, two elastic straps, seven clips, and four strap tabs.