This is a Phase Change Cooling Product (PCCP). Submerge inserts in ice water or put in freezer until solidified, place into carrier and wear! Inserts may be reactivated as needed.
100% cotton crown cooler. Hook & loop attaches easily to hard hat liner (hard hat not included). Phase Change Cooling Inserts maintain a comfortable 58°F (15°C). Includes one (1) Phase Change Cooling Crown Cooler Insert HS3039.
Crown Cooler 
