GRAY-NICOLLS ATOMIC HELMETExceptionally strong non flex peak with fixed, non reflective faceguard prevents ball penetration. Sleek super fine satin cloth covered ABS outer shell with 3 air flow vents EPS inner shell provides maximum protection. Internal size adjustment dial ensures secure and comfortable fit. Conforms to AUS and NZ Standards and new ICC Standards. SIZES: SMALL (DIAL 51 54cm) MEDIUM (DIAL 55 58cm) LARGE (DIAL 59 60cm) XL (DIAL 61 62cm)