The Eco-friendly WOOD PLASTIC COMPOSITE outdoor decking / flooring we produced is made of = 60% bamboo/wood fiber (Professionally treated dry bamboo/wood fiber)+ 35% HDPE (Grade A Recycled HDPE)+ 5% chemical additives (Anti-UV agent, Anti-oxidation agent, stabilizers, colorants, anti fungus agent, coupling agent, reinforcing agent, lubricants...etc.)