Geotextiles are porous fabrics which with soil end up separating, filtering, reinforcing, protecting, or draining. Geotextiles are made from polypropylene or polyester. Geotextile fabrics come in three basic forms- woven, needle punched or heat bonded. Geotextiles and related products have many applications and support many civil engineering applications including roads, airfields, dams, and reservoirs among various others. Usually geotextiles are placed at the tension surface to strengthen the soil. Geotextiles are also used for sand dune shielding to protect upland coastal property from storm surge, wave action and flooding. Geotextiles are also used as matting to stabilize flow in stream channels, improve soil strength at a lower cost than conventional soil nailing, and allow planting on steep slopes, further securing the slope.