3' x 100', 3 OZ, 12 Year Weed Barrier, Environmentally Safe Fabric That Controls Weeds Before They Start, Is Fabricated Using A Spunbond Method, Which Sandwiches Melt Blown Material Between 2 Layers Of Spun Material, Forming A 3 Ply Layer Of Weed Protection, Is Hydrophilic Treated, Providing Improved Water & Nutrient Flow Through The Fabric.