A revolutionary performance headwear worn by all MLB clubs throughout the entire baseball season including Spring Training, Batting Practice and select regular season games. Always at the forefront of innovation, the 59FIFTY is infused with the latest NE TECH materials to keep players cool and comfortable on the field of play. Made with a new state-of-the art performance diamond patterned fabric, the first-class Diamond Era 59FIFTY is light and breathable. The premier cap also features SOLARERA, 50+ UV protection that helps deflect the sun's unforgiving rays and COOLERA technology that wicks away sweat to keep players comfortable, allowing them to focus on optimal performance.