This sunbelt ground cover weed barrier for nurseries and greenhouses is UV stabilized and permeable to air and water and a low-cost, ecology-safe alternative to herbicide use. Holds up in the light. The most cost-effective and safe way to control weeds and grasses in your production field or greenhouse is to stop sunlight from aiding their growth. Woven black polypropylene. Allows air and water to penetrate for worry-free irrigation. Resists tearing and puncturing. Yellow guide strip every 12-inch helps align plants. Guaranteed to last five years in direct sunlight. For greenhouse and outdoor use. Measures 4-feet width by 300-feet length.