- Material: Polyurethane * Length: 5 feet * Suited for waves 1 to 4 ft * Stainless steel swivels * With key pocket * Colour: Assorted The new FCS Comp Essential Series Leash is made of durable polyurethane material with a length of 5 feet and suited for waves 1 to 4 feet. It is made of stainless steel swivels with a key pocket.