Designed with an integral coil system, the Racing SUP Adjustable Calf Leash is designed to offer minimal resistancedrag for flat water and open ocean paddling. Recommended use: flat water and open ocean. Ideal for use on SUPs fitted with a leash plug at the front of the board. Adjustable cord length best suited for boards from 12 ft. 6 in. to 14 ft.. Adjustable rail saver keeps leash on the board deck and eliminates drag while offering freedom of movement. 6 ft. expandable coil section to reduce drag while maintaining the strength of a regular leash. Smooth rotating nylon cuff and rail saver swivel assembly. Machine stainless steel swivels. Cord thickness: 7 mm. Imported.