Gator Fabric GF3.5 Non-Woven is a needle punched non-woven geotextile made of polypropylene fibers. Gator Fabric GF 3.5 Non-Woven geotextile is ideal for drainage, filtration and will allow water flow of 165 gallons per minutes per square foot in a paver or retaining wall applications. Its filament fibers are used for soil separation and drainage. They combine high durability along with excellent physical and hydraulic properties. It is non-biodegradable.