There are countless air compartments inside to create a icy effect. Just immerse your favorite clothes in clean water for a few minutes and then squeeze them dry, because the principle of heat dissipation under vaporization will reach a lower temperature than the surrounding air, thus giving the skin an extremely cold feeling. In addition, because of its excellent water absorption, it can easily absorb the sweat and water traces on the surface of the pet's skin, and can be restored to the icy effect as long as it is repeatedly placed in the water and soaked and wringed out for repeated use. The heat evaporates and evaporates at the same time as the water evaporates, lowering the body temperature and making it cooler. Features: Product name: pet cooling vest Material: PVA Dimensions: 30 x66x 36 x 22 cm Weight: 150g Packing size: 34.5x21x1cm Suitable for: pets within 66cm bust