HyperKewl 6535 Evaporative Cooling Crown Cooler with Neck Shade 60% HyperKewl,40%Nylon Imported This product is highly durable Easy to use This product is manufactured in United States 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