STS Trout & Steelhead, Strong and Highly Abrasion Resistant, Premium, 100% Fluorocarbon Performance Leader Material, Virtually Invisible.
STS delivers incredible abrasion resistance and maximum impact and knot strength, all with a smaller line diameter than monofilament.
Fast-sinking line that gets you in the "strike zone" quicker and with a lower refractive index than monofilament line, it is significantly less visible underwater.