... VENT SYSTEM; 3.HIGH DENSITY EPS. open face motorcycle helmet 808 specification descrption:1.SHELL: Make up of ABS2.Design:Aerodynamics ... ,high energy absorbing & shockroof4.Comfortable,Removable and washable inning5.Sharp top ventilation6.Anit-scratch shield7.Quick release shield system8.Quick release ... ,S,M,L,XL DOT open face ABS motorcycle helmet 808