Tear-resistant yet flexible, from the thin Competition Leash (only suitable for light boards and smaller waves), to regular leashs (allround leashs for all board types and conditions) to big wave leashes (extra thick leashs for SUP boards or extreme conditions, these leashs are very stiff and tough, therefore not recommended as an all-rounder for surfboards)The length Leashline depends on the length of the board. As a rule, the leash should be no more than 6 inches longer or shorter than the boards length:6 feet leash = 5.6 - 6.6 feet board length7 feet leash = 6.6 - 7.6 feet board length8 feet leash = 7.6 - 8.6 feet board length9 feet leash = 8.6 - 9.6 feet board length10 feet leash = 9.6 - 10.6 feet board lengthDetails:extra strong 7 mm thick recycled urethane cord2 stainless steel jointsT-bar board attachment with jointfastening loopTriple layered edge protectorsNeoprene cuff (Yulex natural Rubber) with quick opening and integrated key pocket