You have used helmets of Fibre and some even of Metals. Now, be ready to have something of stone. An Italian company has created thin films of Marble and Granites to be coated over Helmets, giving them whole new look. They are available in 15 different kinds of granites. Actually it was considered impossible before, as both granite and marble are not considered malleable. However, if cut into so thin slabs like 0.3 mm thick they become malleable, and this has been actually achieved and because of its close resemblane to usability like metal foils viz., aluminium foils they have been called Stone Foils. Tremendous Breakthrough !