Rio Mainstream Sink Tip Line Size:WF4F/S3 Improved version of the GPX

Improved version of the GPX taper

a screw-in fighting butt and counterweight washers that fine-tune balance

Slightly heavier than standard lines for easy loadingSupple core with a slick coldwater coating

This friendship brought on the development of the most popular spey line that two hands have ever touched

This medium sized ultra-lite fly box features 2 Micro Slit Foam faces with 66 slits for large flies

Rio Mainstream Sink Tip Line Size:WF4F/S3 Improved version of the GPXRIO's Mainstream series of fly lines have been developed to meet the overall needs of the average and novice fly fisher, and are designed to optimize rod performance with slightly heavier and shorter head lengths. Every Mainstream line undergoes the same rigorous production processes and quality control standards as all RIO fly lines, and is made in RIO's Idaho manufacturing facility. Each line is built with a slick coating on a supple memory free