The NX Ferrule Mezz is made of a specially formulated nylon fiber material (it's a lightweight nylon fiber)
It has certain ammount of modulus of elasticity, but yet it has resistant to friction heat.

Details:

What's the ferrule?
The ferrule is the segment of a cue stick below the tip, fastened to the shaft on a projection know as the tenon.
The ferrule forms a flat base for attaching the tip and prevents the shaft from splintering.