A COMPLETE SERIES OF SINKING LINES DESIGNED for easy distance and complete fly control, with ultra-slick performance. 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 "oehang", and features RIO's "oeDensity Compensation" (except type 7) for complete fly control.