The New Nylgut is nor common Nylon or Carbon (Flurocarbon fishing line or PVDF), or a mix of them. It is a plastic compound of three different components.
It is a plastic compound of three different components. Compared to Nylon, New Nylgut produces a better sound and stays in tune longer.
Due to it's higher density, similar to that of pure gut (1.30 gr/cm3), New Nylgut produces a better sound than Nylon and that is not metallic as that of the so-called 'carbon' (fluorocarbon) PVDF strings.
In other words, it is probably the first genuine synthetic gut in the world.