Econobraid Polyester has a low stretch 100% polyester jacket and polyester/ polypropylene blend core. This fiber combination has several main advantages: The polyester lends a high tensile strength, weather resistance, and abrasion resistance to the cord, while the polypropylene adds bulk and ensures its economy. Econobraid is also resistant to mold, rot, and mildew. Econobraid Polyester is an all-purpose cord with an unlimited amount of commercial applications.  * Other lengths available upon request ** Do not exceed Working Load Limits