Dewitt 6' x 250' 5 oz. Black Pro 5 Weed Barrier. It is a woven, needle, punched polypropylene bulk roll that provides 1500 sq. ft. of coverage. This professional landscape fabric conserves soil moisture, increases growth, and prevents unwanted weeds from germinating. Twelve-inch spaced, colored lines make for easy plant alignment. Backed by a 30-day warranty.