Pine Bark is a natural material. It comes from the bark of Red Pine trees. It releases acid into the soil helping plants that do well in acidic soils. It is dark brown in color with a reddish tint. Unlike other natural barks, this one will fade very little. It is very finely shredded and will break down in 1 – 2 years. Plan on topping this one off a little every year. 400 – 500 lbs. per yard.