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 6536 Skull Caps Tie fasten in back ensures a comfortable fit for all Comfortable, quilted cotton or nylon outer w/polymer embedded fabric inner American Flag, Black, Desert Camo, Royal Blue One Size     Evaporative Cooling 6522 Beanies Hook & loop closure for a perfect fit Comfortable, quilted 100% cotton outer w/polymer embedded fabric inner, water-repellant nylon liner, and hoop & loop attachment American Flag, Royal Blue One Size Can be ordered in NOMEX™ (6522-N) and INDURA™ (6522-I) fire resistant fabrics     Evaporative Cooling 6524 Baseball Caps Combined cooling relief and protection from the sun; adjustable hook & loop closure w/removable cooling liner 100% cotton outer w/polymer embedded fabric inner, water-repellant nylon liner, and hook & loop attachments Royal Blue One Size     Evaporative Cooling 6574 Baseball Cap Liners Replacement cooling liner; attach to Baseball Caps using hook & loop Comfortable, quilted nylon outer w/polymer embedded fabric inner, water-repellant nylon liner, black cotton-poly elastic trim, and hook & loop attachments Silver One Size For Evaporative Cooling Baseball Caps (6524)     Evaporative Cooling 7021 Boonie Caps Classic hat for many uses; tie fasten Comfortable, quilted 100% cotton outer w/polymer embedded fabric inner, and water-repellant nylon liner; tie fasten Universal Army Digitized Camouflage and Marine Desert Digitized Camouflage One Size     Evaporative Cooling 6521 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 w/polymer embedded fabric inner, and hook & loop attachments Royal Blue One Size     Evaporative Cooling 6534 Crown Coolers On the job heat stress management; hook & loop attaches easily to hard hat liner (hard hat not included) Comfortable, quilted nylon outer w/polymer embedded fabric inner, water-repellant nylon liner, black cotton-poly elastic trim, and hook & loop attachments Royal Blue One Size