WPC, also known as wood-plastic composite, is a material made of wood fibers or sawdust mixed with plastic and other additives. There are various synonyms for this term such as composite lumber, composite decking, wood composite, and composite wood. The term composite lumber refers to a type of engineered wood that contains plastic resins such as polyethylene, polypropylene, or polyvinyl chloride. Composite decking is another synonym for WPC, typically used for outdoor flooring such as patios, decks, and docks. Composite wood and wood composite are also used interchangeably with WPC, as they all describe a material that blends wood scraps and plastic into a durable and long-lasting product.