Evaporative Cooling Headwear TechNiche's Evaporative Cooling Headwear provide 5-10 hours of cooling relief per soaking. They are lightweight, durable, and washable.   Evaporative Cooling 6594 HyperKewlTM 6 Panel Baseball Hat  HyperKewl cooling material is integrated directly into hat panels Provides 5-10 hours of cooling relief Designed specifically for outdoor activities Comfortable quilted nylon outer, with HyperKewlTM fabric inner and water repellent nylon liner Hook and loop closure Hi-Viz Lime and Khaki (Custom available) One Size     Evaporative Cooling 6593 HyperKewlTM Sport Cap HyperKewl cooling material is integrated directly into hat panels Provides 5-10 hours of cooling relief Designed specifically for sporting activities Comfortable quilted nylon outer, with HyperKewlTM fabric inner and water repellent nylon liner Hook and loop closure Blue on white (Custom available) One Size     Evaporative Cooling   6591 HyperKewlTM Ranger Cap Tie fasten; classic hat for many uses Comfortable, quilted cotton or nylon outer with HyperKewlTM fabric inner Khaki, Army ACU Digitized, Marine Desert Digitized S/M, L/XL     Evaporative Cooling 6536 HyperKewlTM Skull Caps Tie fasten in back ensures a comfortable fit for all Comfortable, quilted cotton or nylon outer with HyperKewlTM fabric inner American Flag, Black, Marine Desert Digitized, Army ACU Digitized, Mid Blue One Size     Evaporative Cooling 6592 HyperKewlTM Bucket Cap Provides 5-10 hours of cooling relief Designed specifically for sporting activities such as fishing or hiking  Removable HyperKewlTM fabric cooling liner Khaki and Blue (Custom available) One Size     Evaporative Cooling 6522 HyperKewlTM Cooling Beanies Hook & loop closure for a perfect fit Comfortable, quilted 100% cotton outer with HyperKewlTM fabric inner, water-repellant nylon liner, and hoop & loop attachment American Flag, Mid Blue One Size Can be ordered in NOMEX (6522-N) and INDURA (6522-I) fire resistant fabrics     Evaporative Cooling 6524 HyperKewlTM Baseball Caps Combined cooling relief and protection from the sun; adjustable hook & loop closure w/removable cooling liner 100% cotton outer with HyperKewlTM fabric inner, water-repellant nylon liner, and hook & loop attachments Khaki and Royal Blue One Size     Evaporative Cooling 6574 HyperKewlTM Cooling Baseball Cap Liners Replacement cooling liner; attach to Baseball Caps using hook & loop Comfortable, quilted nylon outer with HyperKewlTM fabric inner, water-repellant nylon liner, black cotton-poly elastic trim, and hook & loop attachments Silver One Size For HyperKewlTM Evaporative Cooling Baseball Caps (6524)     Evaporative Cooling 7021 HyperKewlTM Cooling Boonie Caps Classic hat for many uses; tie fasten Comfortable, quilted 100% cotton outer with HyperKewlTM fabric inner, and water-repellant nylon liner; tie fasten Universal Army Digitized Camouflage and Marine Desert Digitized Camouflage S/M, L/XL     Evaporative Cooling 6521 HyperKewlTM Cooling Hard Hat Liners Effective relief from heat stress; attach with hook & loop directly to hard hat liner (hard hat not included) Comfortable, quilted 100% cotton outer with HyperKewlTM fabric inner, and hook & loop attachments Mid Blue One Size     Evaporative Cooling 6534 HyperKewlTM Cooling Crown Coolers On the job heat stress management; hook & loop attaches easily to hard hat liner (hard hat not included) Comfortable, quilted nylon outer with HyperKewlTM fabric inner, water-repellant nylon liner, black cotton-poly elastic trim, and hook & loop attachments Mid Blue One Size