Suspension and shell design fully compliant to ANSI Z89.1-2014 Type II, Class E plus EN12492 penetration and front, side and rear impact testing requirements for improved all-over protection. Chin strap included to secure helmet in place upon falling or sudden impact/movement. Fits most heads (hat sizes 6.5 – 8 / 21in – 25 in / 53cm – 63.5cm).