The COOL PET PAD is a revolutionary new self-cooling pet cushion that cools without refrigeration, water or electricity. No maintenance, no mess.The COOL PET PAD is weight or pressure activated. As soon as your 4 legged friend lies down the cooling effect starts. It will last up to 3 hours of constant use and will last for years. It will re-charge itself automatically after a brief period of non-use. How cool is that? (Get one for yourself!)