triangle motorcycle helmets youth off road sport atv motocross dirt bike [dot] red (medium) triangle 1 shells 2 eps<br> certified: fmvss no.218; ece r22.05<br> gr: 1450 kg±50kg<br> advanced abs shell with high pressure thermoplastic technology<br> multi density eps liner<br> ventilation system with top and rear extractors liner<br> double pc visor and removable dvs treatment with quick change mechanism system<br> soft laser cut padding, dry comfort with hygienic treatment<br> fully removable, washable interior liner<br> padded chin strap with micrometric closure<br> <br> sizing information:<br> adult size small: 55-56 cm / 21.65-22.05 inches<br> adult size medium: 57-58 cm / 22.44-22.83 inches<br> adult size large: 59-60 cm / 23.23-23.62 inches<br> adult size xl: 61-62 cm / 24.02-24.41 inches<br>