Rio Mainstream Trout Double Taper Fly Line Fly Fishing green DT4F bee04 Improve your visibility to avoid B0BMM3MRCC Improve your visibility to avoid getting decapitated by a jet ski or a speed boat wood or other materials Rio Mainstream Trout Double Taper Fly Line Fly Fishing Description: Targeted to the overall needs of the average fly fisher RIO 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 core for the best in performance Slightly heavier than standard lines for easy loading nbsp Supple core with a slick cold water coating