It is made of E glass Fiberglass Yarn. The 3D spacer fabric consists of two bi-directional woven fabric surfaces, which are mechanically connected with vertical woven piles. And two S-shaped piles combine to form a pillar, 8-shaped in the warp direction and 1-shaped in the weft direction. The designs of structure parameters including the areal density, the height and distribution density of the pillars are flexible. The 3D spacer fabric composites can provide high skin-core debonding resistance and impact resistance and impact resistance, light weight. high stiffness, excellent thermal insulation, acoustic damping, and so on. It is compatible with Polyester,Vinylester and Epoxy resin and widely used in hand lay up products, such as marine double wall tank,automotive parts, railway vehicles, sports and other areas.