Material: "Georgian Dimond" - strictly classified technology, material found in The Caucasus Mountains by Georgian climbers. At first thought to be a diamond, turned out being material which can be melted at a certain temperature (classified) and hand sculpted in a form, in this case, as a frame, by hand, by specially trained professional sculptors. It is lighter and more flexible than Carbon fibre, more rigid than titanium, unscratchable and able to rehabilitate in any case from any kind of damage, in which we dare you to cause!