Injected plastic shell construction • 16 vents parts for a better air circulation • Removable & washable inner lining • 2 sizes of shell : 3XS>M and L>XL • Weight : 900gr (+ or - 50gr) • Helmet designed and developed for BMX and DH practice only, can’t be wear for motocross pratice • For children, we recommend sizes from 3XS to XS