The exterior is made of windproof and waterproof polyester fabric. This trooper trapper hat is composed of a hat, a removable mask and an adjustable scarf. Your head, ears, face and neck can be fully protected. Wear this winter trapper hat a, you can feel warm when going out on a cold winter day, so as to enjoy. You good time of winter. There is an air valve in the middle of the removable mask to breathe easily. This classic pilot style thermo winter hat is great for outdoor activities in winter, such as skiing, snowboarding, skating, sledding, snowshoeing, camping, hiking, hunting, fishing etc.