Trex Company, Inc. is a manufacturer of wood-alternative composite decking, residential railing, and other outdoor items made from recycled materials. Headquartered in Winchester, Virginia, Trex is the world's largest manufacturer of wood-alternative decking and residential railing, and a leader in high-performance, low-maintenance outdoor living products. Trex composite decking products are made of up to 95% recycled materials. In redirecting more than 300 million pounds of plastic and scrap wood from landfills each year, Trex is one of the largest plastic film recyclers in North America. Over the past 30 years, the company has diverted more than 5 billion pounds of polyethylene plastic from landfills and waterways. Wikipedia