Features an Advanced Tru Fit System TM which includes the X Band design and interchangeable occipital back padding. The X Band TM design has a lower profile, a lighter weight cross strap construction, and Coolmax174 to help accelerate moisture evaporation. Conforms to the shape of the head, improves 'the feel' of the ball as it makes contact with the head, and significantly reduces moisture build up for a more comfortable and sturdy fit. Ideal for athletes who play full out at the highest levels of the game. 2 Sizes Available SmallMedium Hat Size 6 18 7 Circumference 19 12' 22' Large Hat Size 6 78 7 34 Circumference 21 34' 24 12' Please specify size needed when placing order.