Want to ride in style? This bowl-shaped helmet provides protection with more head coverage and is easy to adjust with its adjustment dial. Perfect for riding on urban modules! We have designed this helmet to protect children's heads (ages 4 to 15) during BMX or mountain bike rides. This helmet is made of 100.0% Polystyrene - Expanded and the outer fabric: 100.0% Acrylonitrile butadiene styrene.