Military Headwear Combat extreme heat in the field and on base with TechNiche's different headwear cooling products. All apparel has been approved for operational use without restrictions by the United States Army.   Phase Change Cooling 7022 Military Helmet Inserts Simple and effective heat stress relief; re-useable attachment affixes directly to underside of helmet Phase Change Cooling Inserts maintain a comfortable 58 degrees F (14 degrees C) Include one (1) Phase Change Cooling Insert     Evaporative Cooling 7020 Military Beanies Hook & loop adjustment for a custom fit Provide 5-10 hours of cooling relief per soaking; lightweight, durable, and washable Comfortable, quilted nylon outer w/polymer embedded fabric inner, water-repellant nylon liner, and hoop & loop attachment Universal Army Digital Camouflage and Marine Desert Digital Camouflage One Size     Evaporative Cooling 7021 Military Boonie Caps Tie fasten for a secure fit Provide 5-10 hours of cooling relief per soaking; lightweight, durable, and washable Comfortable, quilted nylon outer w/polymer embedded fabric inner, water-repellant nylon liner, and tie fastener Universal Army Digital Camouflage and Marine Desert Digital Camouflage One Size