Made of non-toxic TPU material and polymer water-absorbent resin, it is tightly sealed, durable and not easy to tear or break. It is safe to use, and the cooling time varies with the external environment. By maintaining an optimal cooling temperature, the cooling neck strap has no risk of skin necrosis or frostbite. If the state of the cooling tube becomes liquefied, put it in the freezer and the neck strap will solidify quickly, which means you can use it again. The cooling tube can be folded and can be easily put into the bag, which is convenient to carry and use when going out. Wear this neck cooling ring while walking your dog, playing golf, playing basketball, cycling, hiking, driving or even gardening, it will keep you cool and comfortable. Material: TPU, Polymer Water-absorbent Resin Color: Pink, Blue Green, Purple(optional) Size: 18 x 17cm, 10.5cm (inner diameter) Weight: 290g Package List: 1 x Cooling Neck Wrap