Koch Industries 1/4 in. D X 50 ft. L Red/White Diamond Braided Polyester Rope

Polyester is very close to nylon in strength when a steady force is applied. Polyester, however, stretches very little (unlike nylon) and therefore cannot absorb shock loads as well as nylon. It is equally resistant to moisture and chemicals and is superior to nylon in resistance to sunlight. Polyester is the most popular general-purpose rope in the boating industry. Polyester comes in a double-braid construction which increases its strength making it the strongest of rope types.