A composite material is a material that is produced by combining two or more constituent materials with notably dissimilar chemical or physical properties. The individual elements remain separate and distinct within the finished structure, distinguishing composites from mixtures and solid solutions. The constituent materials are known as the matrix (binder) and the reinforcement, and a portion of each kind is needed at least. The reinforcement receives support from the matrix as the matrix surrounds the reinforcement and maintains its relative positions. The matrix materials are polymers, ceramics, or metals, while the reinforcement materials are fibers or fragments of a stronger material. The most common engineered composite materials include reinforced concrete and masonry, composite wood such as plywood, and reinforced plastics such as fiber-reinforced polymer or fiberglass. Composites offer significant benefits in various material performance aspects, exceeding the mono-material alternatives and particularly standalone use of the constituent parts. Composites are used in various applications such as boat hulls, surfboards, sporting goods, swimming pool linings, building panels, car bodies, and cement roads.