KUYOU Multi-Sport Helmet for Kids Cycling/Skateboard / Bike/BMX / Dry Slope Protective Gear Suitable 1-6 Years Old. CE EN1078 Certified /CPSC Standards (This is the current european safety/manufacturing standard for helmets. The toughest testing requirements for helmets are currently imposed by CE-tests, including impact damping capabilities, effectiveness of the strap system as well as range of vision.) Cutting-edge child safety helmet for biking/cycling, skating, skateboard ,BMX ,Dry slope ,and more. Suitable for Head circumference Size 53cm -55cm (20.87"-21.65") children from 1 -6 years old (Adjustable Fit head size ). Constructed with an ABS hard-plastic shell and a dual-density EPS liner,9 vents allow cool air in and warm air out. Skateboard Helmets for children offer your child maximum protection at a minimum price. Lightweight and superbly well ventilated these skate helmets will ensure that you are protected from serious head injuries.