Product Description: The Soil Separator Trench Wrap is used to separate gravel and soil backfill in a trench, allowing the gravel to remain porous and the soil to stay firm and intact. The non-woven, spun bonded fabric exceeds most industry standards and weighs a mere 0.5 oz. per square yard. With Soil Separator Fabric, you have an economical solution for Trench Cover and Trench Wrap.