The Seirus EVO Thermax Headliner is perfect to stay warm and protected from all the climate conditions. Designed with high-performance polyester which provides maximum wicking while retaining heat. It features 4-way stretch, flat-seam construction, and the ability to fit seamlessly under hats and helmets this is the perfect addition to your kit. Engineered with HeiQ V-Block technology to provide antimicrobial protection inside and out. The Seirus EVO Thermax Headliner is a great choice if you want unlimited warmth and protection. | Seirus EVO Thermax Headliner Hat