TECHNICHE INTERNATIONAL 6534 Hyperkewl Evaporative Cooling Crown Cooler, Blue, 12 Per Case 60% HyperKewl,40%Nylon Imported Hyperkewl Evaporative cooling crown cooler, blue, 12 per case Brick-red Color | nonflammable | provides a fireproof acoustic seal This is manufactured in China Uses Hyperkewl Fabric to cool for 5-10 hours Attaches to most hard hats or bump caps No slimy residue or swelling gel or crunchy chemicals No slimy residue or swelling gel or crunchy chemicals