Product details:

Magnetic Visor Release System (MVRS) releases in the event of a crash. Lightweight Injection molded polycarbonate & ABS shell construction disperses energy in the event of a crash. 4 shell and 4 EPS sizes for a precise fit. Removable and washable comfort liner and cheek pads. 9 intake and 4 exhaust vents for optimum airflow. Exceeds ECE 22.05 and/or DOT certifications. Sizing For proper fit and size measure the circumference of your head 1 above your eyebrows and around the largest portion of the back of your head. 18 1/2 - 18 7/8 ------- Youth Small 19 1/4 - 19 3/4 ------- Youth Medium 20 - 20 1/2 ----------- Youth Large