This is a mastery series Saltwater Line from Scientific Anglers.
Their specialty Saltwater Taper provides top casting performance in a wide range of conditions. The small overall diameter reduces wind resistance and the highly resident coating gives the line the durability required for harsh saltwater use. It’s compound taper improves performance in the wind without compromising delivery, and the supple core and low memory make it an excellent choice in both cooler climates and under the tropical sun. The line floats high above weeds and coral making it the ideal choice for wading anglers and the subtle color, although visible to anglers is less visible to wary fish.
This is a weight forward 6wt floating fly line. Would make a great bass line as well!!