These tightly plied, polyester 16-strand lines offer a smooth, snag-resistant surface. Polyolefin yarns in the core of each cover strand reduce weight and improve handling. Twisted parallel blue yarns, in a trademark blue core, allow the rope to stay firm and round while in use. The core also acts as a warning flag, if the cover is ever cut. The tough, durable cover is treated with a protective finish that minimizes abrasion and maximizes rope life.