Geotextiles are porous synthetic fabrics and are often constructed of polyester or polypropylene. Geotextiles are used extensively in many industrial, coastal, and geotechnical engineering constructions for filtration, drainage, separation, and protection. Non-Woven Geotextile Fabric connects long or short fibers using needle punching or other processes. The geotextile is then subjected to further heat treatment to increase its strength.