Trixie Cooling Vest for Dogs is made from absorbent PVA material, and adjusts with a hook and loop fastener. Trixie Cooling Vest is easy to use, all you have to do is soak it in water and the inner material will hold the water and keep your pet cool as long as it’s on. It has a Velcro to hold it in place. It is safe to use for all breeds and ages.