BMP - Turf Reinforcement Mat Polypropylene Straw (BMP- TRM PS) is a long-term, permanent mat manufactured using a top and bottom black UV stabilized, heavy duty synthetic netting, filled with 67% polypropylene fiber, 33% weed-free agricultural wheat straw, designed for use on steep slope and medium to heavy flow channel applications. These permanent mats are designed to reduce soil erosion and channel sedimentation through a combination of physical and biological means. The thread used to reinforce the netting is also UV stabilized polypropylene. (edited)