mens xl motorbike helmet unwanted present never used as too big for me. Standard: Meets or exceeds SNELL & DOT standards (XXXL DOT only). Shell: Lightweight injection-molded thermoplastic shell with three shell sizes for added comfort from youth to adults. Ventilation: Fixed forehead vents, two lower rear venturi exhaust vents, and a flush-mounted chin vent allow flow-through ventilation. Interior: Fully removable interior. Others: Aerodynamic vented visor. Nylon strap-retention band neatly secures chin strap.