CL102 Polyester Cord Dog Leash is extremely strong compared to other synthetic materials such as nylon. It is made out of premium grade leather that is a resilient, long-lasting, and durable material. It does not degrade in quality or appearance due to moisture, tough climate, shear forces, among others. CL102 Polyester Cord Dog Leash is easy to use and maintain. It comes in high-grade packaging that keeps the product safe during transportation.