RIO's Leviathan series of lines have been specifically designed for the largest of tropical species. Each line features a powerful front taper to cast the biggest of flies, and a short, heavy head to load blue water rods. The majority of lines are built on a tough, ultra strong core in excess of 70 lbs that will easily battle large fish, and resist being cut on coral and rock structures. A hard, tropical coating prevents the line from wilting in the heat.