PRODUCT DETAILS This helmet has an Advanced Thermo-Poly Alloy Shell (A.T.P.A) shell and DVD drop down visor design with a dark smoke shield. Cool-Core comfort liner D-ring retention system Meets or exceeds D.O.T. standards SPEED AND STRENGTH ADULT HELMETS Helmet Size Head Circ. (in) Head Circ. (cm) M 22 1/2" - 22 7/8" 57 - 58 cm L 23 1/4" - 23 5/8" 59 - 60 cm XL 24" - 24 3/4" 61 - 62 cm |