1、Polymer Phase Change Material: The ice pack of this cooling vest is made of polymer phase change material, which completes icing and cold storage in about one hour, and continuously and stably provides 18℃ icy coolness which is more suitable for human body's health, with light weight, long service life, and convenient to wear. 2、Excellent Polyester Material: This cooling safety vest is made of excellent polyester material, which is soft and comfortable, skin friendly and breathable, not easy to be damaged and has a long service life. 3、Multifunctional: This cooling ice vest is multifunctional, it can continuously cool down the human body, the temperature will not be lower than 18 ℃, it can prevent frostbite, the water bag can pass the 100 kilograms pressure test, it is safe and reliable. 4、Easy To Use: This summer cooling vest is very easy to use, all you need to do is to put the and good ice packs into the pocket and put it on, it is very convenient and can be used again and again. 5、Wide Application: This cooling cold vest has a wide range of applications and can be used for firefighting, catering, takeaway express, medical icing, petrochemical, high temperature workshop, outdoor construction and so on. Item Type: Cool Vest Material: ABS, Polyester Fiber Enthalpy: 243.3KJ Cooling Time: Approx. 3 Hours 1 x Vest 4 x Cooling Bags