One size fits all Bullet Youth Helmets. Our products are constantly evolving as action sports push new boundaries. Bullet takes pride in producing safety gear that you can trust. Shell: High density ABS injection moulded Liner: EPS polystyrene foam Ventilation: 12 vent cooling system Inner padding: 3 piece removable and washable Pads included 9mm, 6mm & 3mm Safety certificate: CE EN 1078 Sizing : 49-54cm - one size fits all