GET INTO THE GAME WITHOUT LOSING YOUR COOL. SPACER MESH PANELS ON CAP BACK ALLOW COOLING VENTILATION ON EVEN THE WARMEST DAYS. 100 PERCENT COTTON IN FRONT TWO PANELS; 57/43 POLY/COTTON SPACER MESH IN MID AND BACK PANELS. STRUCTURED. MID PROFILE. 6 PANELS. STRETCH FIT. NEW ERA SEAM TAPING. 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).