You dont always need a completely invisible line, and some anglers (and their guides) prefer a line thats easy to see. Visibility helps with loop control when casting and makes it easier to locate your fly when its underwater. The new Sky Blue Liquid Crystal is made with the same polyethylene coating, but it is extruded over a blue-tinted monofilamant core. The line fades from stronger blue color in the center to a light blue tint on the outer edges, making the line easy to see from above, while providing a subtle, blurry profile when viewed by a fish from below the surface. We believe the Sky Blue Liquid Crystal is the perfect compromise, offering a line thats nearly invisible to the fish but easily seen by anglers and their guides.