Leatt - 8.5 Off-Road Helmet Kit (v23)Composite shell in three sizes Brain injury reduction technology Reduces forces associated with concussion Pro fit elastic comfort liner that shapes to your head Large ventilation channels to keep your head cool even at lower speeds 4 densities of impact foam for reduction of forces to head and brain Visor has breakaway function to reduce forces to head and neck in a crash Clip on visor extension X Static inner liner is washable, breathable and has