RIO Mainstream Freshwater Fly LineRIOs 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. The powerful front taper gives you an improved presentation and turnover, meaning you'll see more action and ultimately catch more fish next time you head to the river. Features a streamlined, bulletproof loop welded at the front of the fly