Freeze or Micrwave. Convenience. Multiple use include pain management,postoperative,inflammation,swelling,headaches/migraines,stress/tension,traumatic injuries. Reusable,washable, easily disinfected. Specailly formulated gel. Remains pliable when cold. Does not crystallize,separate, or slump. Nontoxic. Frost free. Biodegradable. Eliminates shock to skin. Becomes softer with use. The most unique and versatile SofTouch pack in the series. Great for any and all applications. (8-1/2"x16")