Signature K9’s Cool Pad features the same technology as the Cool Vest and lasts for hours in the heat. The pad is made of two layers of tear-resistant 1000 Denier Cordura Nylon. Each pad takes three internal gel packs. To energize the pad, just put the internal cooling packs, or the whole pad with packs, inside a cooler of ice water. Cools in minutes. Cooling pack ingredients are non-toxic.