Shimano's OCEA Nylon Casting Leader is specifically designed for saltwater casting techniques. Powerful fish like giant trevally, kingfish and tuna can be harsh on hooks and terminal tackle and the inbuilt stretch and abrasion resistance of this premium high molecular weight monofilament leader minimises tackle failure. OCEA Nylon Casting Leader is also preferred for specialised topwater casting techniques to maintain a solid connection and hook-set under heavy drag settings.