Elasto-Gel therapy products are made utilizing a tough, flexible high glycerine gel that is covered with a four way stretch material that allows maximum conformity, hot and cold transfer and comfort. Can be used hot or cold and provides moist heat and soothing cold Stays hot or cold for 20-40 minutes Covers are made of a 4-way stretch material for maximum conformity Remains flexible and soft at temperatures as low as 20 degrees Does not leak even if punctures