Polyester geogrid is a geotechnical reinforcement material made from high-strength polyester (PET) industrial filaments, knitted through a warp-knitting process and coated with a special polymer coating. This structure leverages the inherent high modulus (low elongation) and excellent creep resistance of polyester fibers, making it the material of choice for permanent reinforcement projects requiring extreme long-term strength, durability, and dimensional stability.