Scientific Anglers™ has been the leader in sinking tip fly line innovation, which gives them unique insights into how to produce the most effective sinking tip performance. The key is balancing the line's specific application - still water, slow-moving water, fast-moving water - with the ideal sink rate. They've applied their industry-leading fly line expertise to this pursuit and the result is the most reliable selection of sinking-tip lines available. No other sinking tip lines have been created with this kind of advanced technology and precise formulations, all focused to help you stay on feeding fish.