Doesn't look like much of a fly pattern but you can't argue with it's amazing success at catching fish! The entire body of the Wire Worm is Large Ultra Wire with a thread clitellum (Yes, that's a real word and an actual anatomical part of a real worm. It's the thick band around the worm that secretes mucus- always learning something with fly fishing). The key to the Wire Worm is it's weight and streamline design allow it to SINK FAST. In higher water flows or when you are trying to fish deeper, this fly pattern can do the depth charging job. You canuse this fly even during normal flows as a lead fly so youdon't need to add a split shot on the leader. The volume of this fly patternis a good indicator that anglers dig them because they work.