Constructed of genuine POLYWOOD lumber, a proprietary blend of plastics which includes recycled milk jugs and detergent bottles POLYWOOD lumber requires no painting, staining, waterproofing, or similar maintenance Solid, heavy-duty construction withstands nature's elements POLYWOOD lumber does not splinter, crack, chip, peel or rot and it is resistant to corrosive substances such as oil, salt spray and other environmental stresses Marine-grade quality hardware