3D composites are a way to increase through-the-thickness mechanical properties of laminates by having reinforcement in the thickness direction (out of plane). When compared to a 2D composite, the impact resistance, compression after impact (CAI), and delamination control is significantly improved without significantly reducing the mechanical properties along the plane. Possible applications include wind turbine blades, ballistic armor, boat construction, and the automotive industry. The most common manufacturing technique is resin transfer molding.