The new standard for Scientific Angler fly lines, the Mastery Series MPX Taper Fly Line is the improved version of the classic GPX Taper. Redesigned with more mass toward the front of the head, the MPX mixes power with an added emphasis on presentation, so we can drop a dry fly right in the feeding lane of a brown trout, huck wooly buggers around the river, and turn over heavy nymph rigs. Designed with versatility as a priority, this well-rounded line is excellent with dry flies, nymphs, and streamers, so we can stay flexible on the water and catch more fish.