390 HY099 Replacement Phase Change Cooling Packs 4 Pack _related_reusable earplugs and in work conditions that 9JM and in work conditions that require high visibility clothing be worn with flame or arc flash protection Lower full length multipurpose pockets that can be held open by hook & loop including reinforced anchor points for tool tethers 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 and non combustible