THE NEW SEAGUAR TATSU!!! TATSU is a Double Structure Fluorocarbon (DSF) line. Made with two custom, 100% Seaguar Fluorocarbon resins, extruded in one solid piece, TATSU is simply the best of the very best in Seaguar lines. No other competitor can match Seaguar's proprietary extrusion process that releases the performance power of this uniquely structured line. Seaguar's strongest and softest line, TATSU is the apex of Fluorocarbon. Made exclusively from two different 100% Seaguar resins. Check our website 'www.seaguar.com' for the nearest authorized dealer next to you.