3.2 oz. polypropylene material, which resists tearing, puncturing and weed penetration. It is approved for most government weed control applications. Sunbelt is ideal for greenhouses, outdoor displays and as a weed barrier for plantings without topical coverings where a weed-free environment is a must. Sunbelt is striped every 12 inches to aid in plant alignment and is UV stabilized to last even in direct sunlight