These U.S. Air Force F1B ECW Flight Trousers go over regular pants to enhance heat retention and water resistance. Sounds like just the thing for a full schedule of outdoor activities in the snowy tundra. Conserves essential core body temperatures, keeping you cozy on the snowmobile trail or during snow removal operations. F1B Extreme Cold Weather Flight Trousers Quilted nylon/cotton canvas Water-repellant and flame resistant Reinforced knees and seat Front zipper, leg zippers for easy on/off Note: Does not include suspenders