Most trout are caught within 40 ft. or less of the angler. Knowing this, Scientific Anglers' developed the Mastery Trout Taper Fly Line with a compound taper that excels in short to medium distances and is excellent at delicate deliveries. Advanced Shooting Technology (AST) makes line extremely slick, creating high line speeds and more distance when shooting. Braided multifilament core excels in cold to temperate climates. SA ID makes line easy to identify. Welded loops.