... proof,scratch proof,acid proof etc , steel leaher cover edge for protection.2.Visor: Polycarbonate, hardening surface,flat visor/convex, ... use absorbent sweet net fabric , with EVA cushioning deck,supply for good protection of headcushioning action and comfortable use ;good absorbent ... frame,can be easy to fit in with helmet through Elastic band,which made of high quality Nylon material and very ...