7 in 1 Kids Bike Helmet Set - Kids helmet, two knee pads, elbow pads and wrist pads. There kids helmet and pads set will ensure your kids are in all-round protection while cycling skating and etc.High hardness ABS shell - Helmet use ABS outer shell+high-density EPS inner shell, thickened soft sponge, absorbent, comfortable and durable. Breathable air between the pads and body make you feel comfortable during the sports. Adjustable Strap - Multiple adjustable elastic straps and Velcro closures for secure fit for various knee girths, very convenient to adjust your size. Design for 3 -12 Year Old Children - Helmet head circumference: 48-56 cm/19.68~21.25 inch, Please according to head circumference and child''s weight and age choose. Multi-purpose - Appropriate for inline skating, skateboard, riding bikes, scooters roller blading and other extreme sports.