The DT is designed with a long, level middle section with identical tapers on either end. This design helps to make more delicate presentations when fishing smaller waters and is the best overall taper for roll casting and line mending. Weight Line weights range from 1 wt. The lighter lines are used to make delicate presentations with small flies, while the heavier lines can cast large flies, longer distances, in windy conditions. Function Function refers to what the line does once it hits the water.
Some lines float, some sink and some do both.
Floating lines are used when fish are on or near the surface. A faster sinking tip becomes necessary as water depth and current increase. Color Bright colors, such as chartreuse, are easy to see in the air and on the water and are therefore easier to control.