... rice hull or something else), 7% chemical additives(Anti-UV agent,Anti-oxidation agent,coupling agent,reinforcing agent,lubricants...etc.) ... like natural wood2.Durable,anti-impact,wearproof,with high density3.High capacity of UV-resistance,and color stability4. ... recycled,environmental friendly,saving forest resources8.Barefoot friendly,anti-slip,no cracking9.Weather resistant,suitable from-40 degree ...