The Elasto-Gel Multi-Purpose Wrap is used to deliver hot or cold therapy to any area and will conform to almost any body part. The tough, flexible gel will not leak if punctured and the 4-way stretchLycra coverwill help assure product durability and effective therapy and pain management. Handy Velcro strap holds your Elasto-Gel just where you want it it stay. Heat in the microwave or store in the freezer. Provides 20-40 minutes of treatment. Elasto-Gel products last for years.