ALPINESTARS S.TECH S-M8 ECHO HELMET BLACK/ANTHRACITE SKU 8302621-1146 Description: Shell construction utilizes a highly advanced molding technology with a multi-composite combination: uni-directional carbon composite with aramid layer that gives significant radial strength around the shell, reventing compression but allowing controlled deflection for reducing transmitted impact energy, and providing critical penetration protection. Features: ECE/DOT 4 anatomical shell sizes Multi-density EPS polymer liner Patented A-Head fitting height and angel adjustment system Unique, patented visor release system Collarbone protection feature at the shell base Multi-directional Impact Protection System (MIPS) Emergency Release System (ERS) Eject inflation system fitment inside the crown of the shell