This game-changing baseball cap uses our R-Active, lightweight stretch fabric and features laser-vented back panels for maximum breathability and comfort. Available in three R-Flex sizes to fit all levels of play. SHAPE Mid-Pro FABRIC LITE Performance Poly-Stretch VISOR UForm SWEATBAND Stay-Dri Performance Stretch MATERIAL 98% Polyester, 2% Spandex CONSTRUCTION Knitted FIT & SIZE R-FLEX XS-SM (6 5/8 - 7) SM-MD (7 - 7 1/4) LG-XL (7 3/8 - 7 5/8)