DeWitt Sunbelt woven ground cover consists of 3.2 oz. polypropylene, which resists tearing, puncturing and weed penetration. Sunbelt is ideal for greenhouses, outdoor displays and as a weed barrier for plantings where a weed free environment is a must. DeWitt Sunbelt is striped every 12 inches for aid in plant alignment and is UV stabilized to last even in direct sunlight. Fabric is blocks 99% of light usually lasts 8 to 12 years.