Non Woven 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.
Woven geotextiles are made from polypropylene as well, but the manufacturing process, product characteristics and applications differ dramatically from those of nonwovens. Narrow strands of polypropylene tape are woven together during manufacturing, producing a tough fabric, but one with much less permeability than nonwovens.