... according to a procedure not recommended by the helmet manufacturer. Do not apply paints,solvents, adhesives or stickers on it, except for ... be cleaned by using this method,it should be replaced.Performances :This helmet complies with the European directive 89/686, ... notably regarding ergonomics, innocuousness, comfort andventilation, and with EN397:1995/A1/2000 (-30°C / +50°C) standard ...