Available Sizes For a perfect fit, please measure your head circumference from mid-forehead to ensure you choose the correct size. S - Suitable for 48-56cm, recommended age 3-8 years; Shockproof This children's skateboard helmet has a shock absorption and anti-impact system. The ABS outer shell and EPS foam padding absorb external pressure, helping to absorb impact and protect the head during impact. , this helmet provides excellent protection for outdoor sports such as skateboarding and cycling. Breathable Design: Ventilation system with 11 vents ensures ample fresh air. A skateboard helmet reduces sweating and keeps you cool even during intense activities. PRECISE FIT: Children's helmet comes with adjustable straps and buckles, allowing children to adjust flexibly for a better fit. It is flexible to accommodate children of different sizes and can be adjusted according to the growing child. Versatility: An essential device to protect your child from harm. This skate helmet can be used for many outdoor activities such as rollerblading, inline skating, scooting, biking, rollerblading, skiing and more.