Scientific Anglers' Mastery Series Double Taper Fly Line makes short work out of close casts in tight quarters and is great at precisely laying your fly and line out on slow-moving spring creeks-just as long as you dump the cast. This workhorse of a line has a double-taper design (one that you most likely learned to cast with) and is home to a grip of modern features to keep your line floating high in the film and passing through the guides smoothly. Welded loops on the front and back allow you to get twice the life out of the line by flipping it once one side begins to require a steady supply of floatant to stay adrift.