Polypropylene fabric that resists punctures, tears and weed growth, while still allowing the passage of air, water, and nutrients. The District offers the 6' x 300' roll.
Visit DeWitt's spec page for more detailed information.
Weed Barrier Fabric
All Photos: DeWitt - Down to Earth Protection. Sunbelt (3.2 oz). http://www.dewittcompany.com/Sunbelt__3.2_nbspOZ__.aspx?productid=63&categoryid=45