DeWitt Weed-Barrier® 15-Year Standard Weed Control Fabric is made from UV-treated point-bonded polypropylene for long-lasting performance in permanent landscape areas. It blocks sunlight to prevent weed growth while allowing air, water, and nutrients to reach plant roots. Ideal for use under mulch in flower beds, around shrubs, and trees, this durable, chemical-free fabric helps conserve soil moisture and resists tearing and puncturing.