Weed Control Fabric is the original and still unsurpassed weed supression fabric. The fabric is designed to restrict weed growth. Helps prevent erosion. The durable, woven fabric is manufactured using the highest U. V. Resistant polypropylene available. The woven design allows both air and water to drain, reducing the risk of standing water puddles and root rot.12" marker lines make container alignment easy. Can be used under gravel, soil, sand, or pine straw. Characteristics: Blocks weeds and helps prevent erosion. Long lasting, high U. V. Resistant polypropylene. 12" marker lines for easy container alignment. Water and air permeable and mildew resistant. Use under gravel, soil, sand, or pine straw.