High tenacity nylon core leaders, coated with a super low modulus polymer mixture with different density options. RIO&';s Spey VersiLeaders have a strong nylon core in excess of 24 lb, are tapered for the best in performance, and are available in a range of different sinking (and floating) densities. They are a great addition to Spey lines, light Skagit heads and Scandinavian style heads, and provide the angler with a wide range of quick-change depth options.