MADE OF NYLON -- The nylon is soft, smooth and the rope is also more pliable. It has better flexibility and elongation. It will not wear out your boat during use.At the same time, it is resistant to wear, heat and salt water. DOUBLE BRAID TECHNOLOGY-- unique double braid structure, exquisite technology, to improve the overall performance of the cable more than 15%. COMMON SPECIFICATIONS -- Each line is 3/8inch x 15ft in length, Dock lines 3/8 inch is suitable for boats Under 20 Feet HIGH STRENGTH-- Our 3/8'' Thick Nylon Ropes Provide a Breaking Force of Up to 4035 lbs. For the Safety of You and Your boat, We Recommend that You Use This Tope Set on Boats less than 20 Feet in Length." 100% SATISFACTION: 1-YEAR Limited GUARANTEE. You Can Get a Refund For Any Quality Reason Young Marine 3/8 Inch x 15FT Double Braided Nylon Dock Lines Rope, Dock Line with 12 Inch Eyelet for Mooring Boats, Navy Blue