The Togens Tapered Leader provides a clear fairly invisible line between your fly and your coloured fly line, so not to scare away the fish once the fly is casted out. This line is all-round for ease of rolling
The "X" rating system used for leaders and tippets are measurements of strength and describes the breaking strength and diameter of the fly fishing leader material. The smaller the number the thicker and stronger leader for bigger stronger fish. The larger the number the finer the leader is for the smaller fish, such as trout & panfish.