Our new nylon Pro Cooling Vest will keep your employee, self or worker cool for up to four hours. This vest is available with zipper (50D-PV-ZN) or VELCRO (50D-PV) closures. It is contoured to the torso and is comfortable to wear. This vest will fit most people. Because these vests are contoured, they can be used under protective clothing such as Level A, B, Tyvek, wash down or chemical suits.