Twisted combination rope offers the best of both polyester and polypropylene ropes. A polypropylene core makes it strong and lightweight, and creates good dielelectric properties which means it won't conduct an electric current if it touches a live electrical wire. The polyester jacket over the core creates a stronger layer than an all-propylene rope. Unaffected by water so it retains its strength even when wet; extremely resistant to mold, mildew, rotting, petroleum products, marine organisms, and most alkalis and acids. The twisted construction makes it easy to splice so it's ideal for a wide variety of uses, including safety rope, dock line rope, lock line rope, guy rope and electric utility rope.