Scientific Anglers™ pioneering work with 3M Microballoons™ revolutionized the way fly lines float, and they continue to use this breakthrough technology in all of their floating fly lines. They also employ advanced hydrophobic agents that help repel water and increase floatation, which is further enhanced by the way they entrap air inside the fly line core. AST – Advanced Shooting Technology – is 3M's patented dry-slick coating that prevents dirt and algae from clinging to the line, which allows the fly lines to stay cleaner and float higher for longer intervals. No other floating fly lines provide so many clear and unique technological and performance advantages.

Soon after Scientific Anglers™ invented modern floating fly lines, they also introduced fly fishing's first modern full-sinking lines. Today, they continue to lead the industry in quality, reliability, and selection. Fish feed below the surface 90 percent of the time at a variety of depths. To reach them, you need two things: A line designed for the specific application and a line that keeps your fly in a specific strike zone. Scientific Anglers™ sinking lines excel in both areas. Their advanced tapers, cores, and coatings produce the most trusted performance in fly fishing, and their precise formulations produce consistently accurate sink rates that help keep your fly in front of feeding fish.