All U.S. Wire cord sets and Pow-R-Blocks are double insulated - individually insulated conductors surrounded by and outside jacket - with solid molded plugs. Outer jacket will not mar floors or walls and is resistant to abrasion and deterioration from moisture and sunlight.

The EXTREME All-Weather Extension Cord is constructed of 100% TPE (thermo-plastic 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!