Sinking Line series for easy distance and fly control with ultra-slick performance The Rio Fathom line series is 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.

This line is built with SlickCast, creating the slickest, most durable coating on the market—producing the least amount of friction ever measured in a fly line. That means when casting, lines with SlickCast will cast farther than similar lines made without it. You will love the slickness on your first cast, and you’ll be amazed by the slickness after numerous days on the water. Extra distance comes with ease along with extended drag-free drifts as you notice SlickCast lines slip effortlessly through your rod guides. Slickening agents constantly migrate to the exterior surface so you can trust your SlickCast line to be as slick next season as the day you bought it

Not only does it outcast, but it also outlasts other fly lines. The SlickCast formulae provides for the toughest and most durable fly line coating in the world and blasts off the charts when tested for abrasion and cracking resistance. Lab tests show that a line built with SlickCast lasts 140% longer than the nearest competitor in abrasion testing and lasts 33% longer when tested for cracking.