Premier Rio Grand Fly Line - Designed for the modern, fast-action fly rod. Improved for 2020! The RIO Grand is a full line size heavier than the industry standard, and features more weight distributed towards the front of the line to easily load faster action fly rods. Built with a short head that is easy to cast, this line is also an excellent choice for novice casters who need a little more "feel" when casting. We have enhanced the performance of this wonderful trout line by building it with SlickCast - RIO's proprietary coating technology. SlickCast creates the slickest, most durable fly lines on the market. Lab tests show that lines built with SlickCast have the least amount of friction ever measured in a fly line. The RIO Grand is the best choice of line for the modern, fast action fly rod.