What material is used to make the bow blade elastic

The bow sheet of composite bow consists of two layers of materials inside and outside, the outer layer chooses high elasticity material, and the middle chooses lightweight material support, the overall performance is strong elasticity, low weight and fast rebound.

The common compound bow blade has two kinds of fiberglass and carbon fiber, the fiberglass bow blade itself is light weight, good rebound performance, fatigue resistance is still good, but it is also the lowest level of cheap bow blade, because the material itself is cheap E fiberglass, so the amount of deformation is small, the thickness of the bow blade is relatively thin, and if you increase the deformation of thickening and increase the amount of deformation will be fractured.