Rio Fly Fishing Fly Line InTouch Sink tip Wf6F/S6 15' Type 6 Fishing Line, Black/Yellow The best sinking tip fly line series in the world, with ultra-low stretch performance. The supple floating body section allows anglers to easily mend and control the way the fly fishes, making it ideal for river anglers. Each line has a welded loop on the front end for easy rigging. All fly lines are made with pride in our Idaho Fall facility