TechKewl 6626-RB-M/L Phase Change Cooling Vest 100% Cotton w/Thermal Liner Made in US Removable Phase Change inserts will mating 58' cooling temp for 2-3 hours Washable Outer Vest Includes Vest, 4 Phase Change Inserts and Protective Cooler Bag for Easy Reactivation anywhere Instant Cooling Effect to any area needing cooling