HELMET STRTFGHTR U9BM SMInner shell construction is EPS material allocated at different densities to disperse energy released un case of impact. Outer shell construction use two mould sizes to increase performance dependant on size, using aramid carbon fiber combined with epoxy resin to make shell lightweight, elastic and resistant. Small shell sizes range from XS to M and larger shell size covers L to XXL. "Advanced Padding System" kit included with the helmet allows