Phase Change Cool Pack Set,4 Packs per Set (Front & Back) – Size OS, Clear- Phase Change Cool Packs 390-HY099

Replacement cooling packs are deployed to provide several hours of cooling relief to reduce fatigue and heat stress. For use with 390-EZHYPC EZ-Cool Max combination phase change & evaporative cooling vest.FEATURESCooling packs are deployed in a variety of shapes and sizes for personal comfort and maximum cooling resultsProtection from stress of high temperatures outdoors and indoorsIncludes 1 set of 4 cooling pack insertsCooling effects last for up to 3 hoursTo activate place in freezer, refrigerator, or cooler with ice set at 58ºFSet time of 45 minutes to ensure packs are frozen solid throughoutPCM is non-flammable, non-toxic, and non-combustible