Fourth Element Arctic Hat has been updated with improved features, including a double-layered, lightweight material that provides superior thermal insulation for maximum protection against the cold. The Arctic Hat has been extensively evaluated in diving conditions worldwide, including by the Norwegian Navy, British Antarctic Survey Dive Team, French Marines, and Danish Navy. Its advanced design utilizes cutting-edge fabrics and technology to ensure top-tier performance in extreme environments. FEATURES: Keeps the head dry and warm Superior low bulk insulation for flexibility Performs even when wet High density inner fleece Water-repellent outer layer Used by FBI dive teams and military divers world wide Outer: 80% Recycled polyester, 17% nylon, 3% elastane Inner: 100% recycled polyester Machine washable - Wash cool with half the usual amount of detergent Spin and line dry, DO NOT tumble dry Visit the Fourth Element Arctic Features page for more details.