Smart Temp Portable Reusable Hot And Cold Pad, Large 9 X 14 InchTherapeutic relief of sports injuries, muscle pain, arthritis, cramps. Maintains therapeutic temperatures longer than other technologies. Easier to use than hot water bottles or ice bags. Non-toxic and biodegradable, environmentally safe. One pack has three uses moist or dry heat or cold therapy treatments, unique new technology uses radiant energy, provides deep penetrating heat, pliable when cold or hot, molds to the affected area for maximum benefits.