The RSI Ground Covering program uses only UV stable fabrics for longer life. All our knitted material is guaranteed not to "run" if torn. Our semi-permeable design allows for water to transfer through the material to the ground but does not allow for any seeds or growth to come through from underneath. The RSI Ground covering is professional grade with a number of our end users being nurseries, landscape contractors, and grounds crews, as well as the serious homeowner. The material is designed to left water flow through the fabric while preventing weeds, rocks or animals from coming through.