Non woven Geotextiles Fabrics are probably the most commonly known geotextiles. Nonwoven polypropylene fabric, which has a felt-like consistency, combines strength and flow ability. Available in varying weights and thicknesses, the fabrics are strong but permeable, allowing for varied uses. Nonwoven fabrics commonly are used as a separator between subsoils and rock riprap, and they also are used to separate soils and sized stone in many ground-level and subsurface drainage applications. Nonwoven Geotextile Fabrics have a random, three dimensional pore structure and are highly water permeable, as is necessary in many geotextile end uses.