Dual Comfort CorPaks Hot or Cold Therapy Packs are a versatile solution to help relieve headaches, ease pain, and help reduce inflammation associated with strains, sprains, and other soft tissue injuries. Conveniently store packs in the freezer for cold therapy the moment you need it! These packs stay soft and flexible, comfortably contouring to painful areas. Use cold to ease pain and help reduce inflammation; warm packs in the microwave to aid muscle relaxation and promote healing. Adjustable straps provide compression and secure the pack to the injured area while keeping hands free for daily activities. The pack's two exterior surfaces offer controlled therapy. The light blue, soft surface quickly provides hot or cold therapy while the plush, dark blue surface slowly provides hot or cold therapy. The Dual Comfort CorPaks contain more nontoxic, biodegradable fill than traditional packs to retain cold and heat longer. The soft, frost free pack is gentle on skin and does not need to be wrapped in a towel.