It's all about the warmth. This trapper hunting hat with Heat Boost graphene technology is built to handle the coldest of weather. Made in camo with a tricot shell and Hydrashield waterproof insert to keep you dry and block the wind when the weather turns nasty. The crown is fully lined with Heat Boost graphene short pile sherpa, a new generation of fabric enhanced with graphene's properties of thermal conductivity, wicking abilities, and antibacterial capabilities. Knitting graphene yarn into our sherpa lining supercharges it, making a warm material even warmer - 30% warmer. A thick faux fur lining wraps around the sides of your head and extends through the ear flaps. There are grommet holes over the ears with protective flaps that can be flipped up for better audibility or secured down for added insulation. You'll never want to face the bitter cold without this hat on your head.1 Year Limited warranty