Why Choose A Scientific Anglers line?


Fly fishing humbles us. It leads anglers to believe we are equal parts super hero and insignificant organism. It allows us to value the progression of cutting-edge technologies while taking joy in worn wading boots, entry-level pickup trucks, river-temperature beers, and afternoons trying to chase skunk off the boat. We at Scientific Anglers believe in a facilitation of the two, an ability to provide consumers with the best products available while enabling them to enjoy the simple, and often best, aspects of our sport.

Scientific Anglers began with three men (Leon P. Martuch, Clare Harris, and Paul Rottiers) and a single vision, transposed into a company spanning across the globe, influencing the way modern fly fishermen interpret and practice our sport. The cast, the rods, the reels, and the flies all connect through the cotter pin of fly fishing: fly line. Scientific Anglers became the unequivocal champion of fly-line production through leading market innovation and development during fly fishing’s early widespread industrialization.

Numerous editorials have been penned regarding the physics of fly fishing and the impact of polymeric coatings, evolutionary taper structure, core construction, complex density, and fluid dynamics. At the base of these arguments is a single common denominator: Scientific Anglers. We have implicitly initiated a majority of these arguments by facilitating the development of industry-leading technologies, a practice that inevitably leads to scrutiny amidst competitors. As we continue to walk one step ahead, our focus dwells on forward progress—a vision and mission which consistently and constantly pushes the technological limits of fly fishing.

At Scientific Anglers, we accept responsibility for Spey geek grain-weight battles, trout bum standard-weight struggles, and saltwater suppleness bar brawls.

We enjoy the dynamic struggle between old school, new school, and the evolution of customer and industry demands. What lies between the fish slime and truth is where we flourish. Scientific Anglers rejects the happy medians, the good enoughs, the that’ll do’s, and the status quo.


In the world of fly lines, you’re only as good as the core you build upon. Without the right core materials, lines wouldn’t stand a chance against the harsh environments Mother Nature has up her sleeve. Over the years, we’ve dedicated hours upon hours to constructing optimized cores for every fish, every environment, and every angling situation imaginable.

For each line, we select the proper core, which is then run through several specialized machines that coat the cores with various levels of PVC, which is then cured to create the basis of the lines you see in shops across the world.

The core selection is based solely on the application for that specific line. If it’s a trout-based coldwater line, we use a multifilament core. These are hollow, which aids in flotation. For clear lines, or lines that may encounter warmer temperatures, we use a singlestrand monofilament core. These remain stiffer in warmer temperatures and naturally sink. Lines that are designed for targeting species in tropical environments rely on our Tropi-Core technology, which is a braided monofilament, built to withstand the harshest environments known to mankind. These cores remain stiff, no matter the temperature.


A fly line without a solid coating is just like a car tire built without any tread. It might get the job done for a while, but it won’t be pretty in the end. As with our cores, we’ve spent countless hours developing and maximizing the performance of our fly-line coatings. We’ve created lines that last longer, float higher, and shoot farther—all thanks to the breakthroughs we’ve made with our coating technologies.

Our coatings are based on a proprietary formulation of PVC, which is adhered to one of our cores, depending on the specific application for that line. Floating lines have several things mixed into that PVC coating: specifically, one of our slickness additives, AST Plus or AST, for slickness and increased durability, and a measured amount of glass micro balloons for increased flotation. The AST Plus and AST slickness additives are incorporated throughout the entire coating, from the core to the surface, resulting in slickness that lasts the entire life of the lines. Our major competitors simply overcoat lines, meaning their slickness will wear off extremely quickly.

Conversely, our sinking lines receive a highly specific amount of tungsten powder to create a highly accurate and reliable sinking rate for that particular line. These sinking lines also receive slickness additives, which are built into the coatings all the way down to the core. The final coating technology we impart on some of our lines is our texturing technology. We emboss two different patterns into the surface of lines to reduce the surface areas, decrease friction, and increase flotation, which results in lines that float higher, last longer, and shoot further than any lines on the market.