Boston Red Sox 2019 Official Batting Practice Onfield Cap - Red/Navy. Material: 100% Polyester, High Crown, Structured fit, Flat bill with ability to curve, Fitted, Hex Tech® fabric featuring ultra-lightweight fabric with moisture wicking and UV protective properties, DRYERA ® technology repels weather-related water, COOLERA ® technology wicks away sweat, MICROERA™ technology acts as an anti-microbial to reduce odor, Raised embroidered graphics, Six panel construction with eyelets, Surface Washable, Officially licensed