LONG LASTING RELIEF - Stays cold for up to 45 minutes. Great for sore muscles, inflammation, sports injuries, bruises, sprains, chronic pain, bursitis, injury prevention, surgery recovery, and pain relief. FLEXIBLE WHEN FROZEN - Formulated with all-natural healing clay and oils which allow the ice pack to remain pliable and flexible to mold to your knee, ankle, elbow, shoulder, or back. CONTOURED DESIGN - 12"x21" cold pack provides targeted effective cold therapy where you need it most. Comes with a soft, washable fabric cover to keep skin dry and comfortable - no towels or cloth barriers needed.