Before we go any farther I should introduce the different weaves used by reinforcement fabric manufacturers. Like the cloth used for making your clothes, reinforcing fabrics come in many differing weaves. Of course, some weaves are better than others for certain applications. Within limits, more of the right reinforcement in less resin is better. Tighter, more compacted fabric weaves need less resin and get more reinforcement into a given volume, so are generally stronger than looser, more open fabric weaves.
Tighter weaves are more expensive and harder to work with, though.
Good resin systems, which are also usually more expensive must be used with the better fabric weaves, or problems will result. Hybrids Of The Above Are also used in boats and paddles. A hybrid fabric is one woven of usually just two differing materials, hopefully in such a way that the good characteristics of each material complements any possible bad ones of the other material. The components of graphite and Kevlar hybrids can complement each other well, and some weaves of them give a quite striking visual effect.