Cold therapy is a recognized medical treatment for everyday minor injuries and generally applied within 72 hours following sprains, strains, swelling, headaches, nose bleeds, toothaches, minor cuts & scrapes, insect bites and minor injuries. For shoulder, back, abdomen, knee, elbow, arm, leg. Requires no refrigeration. Single use packs. Remain cold for 30 minutes. 6"x8" (153 mm x 204 mm).