The EXTREME all weather extension cord is constructed of 100% TPE (thermoplastic elastometer) compound which guarantees maximum flexibility as well as abrasion and oil resistance. Furthermore, the TPE compound provides a lightweight, tangle free construction to the EXTREME cord, not commonly found on most standard PVC cords. Tested in some of the harshest weather conditions in Alaska, the EXTREME all weather extension cord is designed for durability to last a lifetime!