The 17 strand structure means the braid holds a much more consistent round shape during casting and under load, whereas other braids will flatten, leading to increased wear and decreased strength. The wet spinning method used during the braiding process leads to the line being more uniform, improving surface smoothness, leading to increased overall cast performance (by up to 5%) and greatly improved absasion resistance (up to 148%). Linear line strength comparison has also been improved by as much as 21%, compared to Ocea 8. All lines feature Shimano's patented Heat Sink technology for improved heat dissipation over extented fights. If you want the best, then you need Ocea 17+!