Chill-Its 6235 Standard Phase Change Cooling Vest, Cotton, Large/X-Large, KhakiThe Chill Its 6235 Standard Phase Change Cooling Vest is made to house phase change cooling packs to help keep workers cooler, safer and more productive. The phase change cooling material maintains a 64F (18C) temperature for up to four hours when activated. Made of a comfortable cotton blend fabric, this vest features adjustable hook and loop closures at the shoulders and waist to provide a customized comfortable fit. Note: This is a non returnable