Easton Natural Solid Mask Tee Ball Batting Helmet Fits players with a hat size of 6 - 6 1/2 inches in or a head circumference of 20 in - 22 1/4 in. Slimmest profile and most aerodynamic venting system on the market High grade ABS shell for strength and durability and EVA impact foam Soft urethane comfort foam for Best Fit and Bio-Dri antimicrobial fabric liner providing moisture wicking comfort Meets NOCSAE standards