The EXTREME all weather extension cord is constructed of 100% TPE (thermo plastic elastometer) compound which allows the cord to stay flexible in the most extreme climates without affecting the cord's performance. 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.