A complete series of sinking lines designed for easy distance and complete fly control, with ultra-slick performance Easy casting, fast loading head for minimum false casts and quick distance Hang Marker shows where to fish The Hang Density Compensation for complete depth control Built on a supple core that will not tangle Built with RIO&';s exceptionally slick, durable SlickCast coating RIO&';s Fathom lines are a series of sinking lines designed specifically for the lake angler. Each line has a short, quick-loading head for minimizing the number of false casts, and for quick, easy distance, and a color contrast between the head and the running line to easily show the line&';s loading point. In addition, each line is built with a Hang Marker that shows anglers when to stop stripping, and when to fish the hang, and features RIO&';s Density Compensation (except type 7) for complete fly control.