Ergodyne N-Ferno 6824 Winter Ski Mask Balaclava, Thermal Wool Blend, Mositure-Wicking MOISTURE WICKING Wool/Polyester blend moves moisture away from the body THERMAL COMFORT High quality polyester and wool blend keeps head and neck comfortable in cold conditions ONE SIZE FITS MOST: Strechable warm polyester/wool blend comfortably fits most heads to provide the ultimate winter protection and comfort. LIGHTWEIGHT Fits easily and comfortably under hard hat or helmet VERSATILE Can be worn as hat, face mask or neck gaiter Thermal Comfort-high quality polyester fleece and wool blend keeps head and neck comfortable in cold conditions Lightweight- durable ski mask that comfortably fits under a helmet or hard hat without feeling too bulky Universal Size- stretchable warm material that can fit any size head for the ultimate head and neck coverage Moisture- Wicking- wool blend moves moisture away from the body Versatile- functional face mask that provides thermal protection in any cold enviroment applications or tasks