The Riverstone Industries Line of 12FT WIDE COMMERCIAL LANDSCAPING ALL WEATHER GROUND COVERING is designed to offer easy to use. PROFESSIONALLY used. Requested 3.2 oz. thick black woven polypropylene fabric with pot lines that are 12 inches apart for easy line-up. The material is designed to let water flow through the fabric while preventing weeds, rocks or animals from coming through. This fabric carries a 2-year warranty.