SMOOTH: This very smooth copolymer line is made for light line fishing •TOUGH: It is extremely abrasion resistant and has great knot strength •STRONGER THAN OTHER LINES: Its is much stronger than other lines at the same diameter •GREAT COLOR: Its color is hard to see in most water conditions. •The Trout SOS fishing line is both smooth and tough. The smooth copolymer line is made for light line fishing while being extremely abrasion resistant at the same time, proving itself to be stronger than other lines at the same diameter. This line also is great for casting distance and manageability, plus it’s got a great color for stealth fishing that’s hard to see in most water conditions.