Woven geotextiles provide drainage by activating water to go through while filtering out the sediments. Non-woven geotextiles are used when both soil separation and permeability are needed. These products are often used to wrap French drains or in conjunction with other sub-surface drainage solutions. Non-woven are also utilized beneath rock riprap revetment, where both separation and drainage are critical. The nonwoven geotextiles are applied in roads, embankment, airfields, landfills and sports construction projects. Spun laid commonly known as Spun Bond Nonwoven fabric are made of the continuous process of fibers spun and directly dispersed into a web-like deflector or can be directed by air streams.