HyperKewl 6535 Evaporative Cooling Crown Cooler with Neck Shade
Evaporative Cooling Crown Cooler with Neck shade uses patented  Hyperkewl cooling fabric to offer 5-10 hours of constant cooling. Attaches easily to any hardhat or bump cap inner liner or straps and offers cooling to the top of the head and back of the neck while providing protection from the sun.