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. FEATURES Cooling packs are deployed in a variety of shapes and sizes for personal comfort and maximum cooling results Protection from stress of high temperatures outdoors and indoors Includes 1 set of 4 cooling pack inserts Cooling effects last for up to 3 hours To activate place in freezer, refrigerator, or cooler with ice set at 58ºF Set time of 45 minutes to ensure packs are frozen solid throughout PCM is non-flammable, non-toxic, and non-combustible