HyperKewl Evaporative Cooling Ultra Sport Cap This product is highly durable Easy to use This product is manufactured in United States Combined cooling relief and protection from the sun; adjustable hook & loop closure 100% polyester mesh outer with HyperKewlfabric inner, water-repellant nylon liner and hook & loop closure 5 - 10 hours of cooling relief per soaking Detachable Sun Shade covers back of neck for ultimate protection Will Not Swell or Bulge, Will not become slimy or leak toxic chemicals