Trex decking is made from about 50% recycled and reclaimed plastic and 50% reclaimed wood. The manufacturer claims the product will not rot or deteriorate because of insects or harsh weather, and resists damage from moisture and sunlight. The plastic part of the product is polyethylene, recycled from plastic bags. The product also includes reclaimed wood from used pallets and sawdust. 800.289.8739. www.trex.com.