With its circular PING woven patch denoting our 1959 beginnings, the Eclipse has a button-less top for added comfort, a moisture-wicking SensorCool headband, and an adjustable Velcro closure to ensure that one size will fit most golfers. - 97% polyester, 3% elastene - Moisture-wicking SensorCool headband - Button-less top for comfort - HD poly woven patch - Adjustable Velcro closure