Get into the game without losing your cool. Spacer Mesh panels on hat back allow cooling ventilation on even the warmest days. 100% cotton in front two panels; 57/43 poly/cotton spacer Mesh in mid and back panels. Structured mid profile with stretch fit. Adult sizes: S/M (6 7/8-7 1/4), M/L (7 1/8-7 1/2), L/XL (7 3/8-7 3/4)*New Era products may not be resold without embellishment.