The Cone Head Stonefly is built to get down fast, making it an excellent choice for deep runs, heavy water, or fast currents. The cone head adds extra weight, allowing the fly to sink quickly and stay in the strike zone longer - especially useful during high water conditions or early season runoff. Designed to imitate large stonefly nymphs, it's a go-to anchor fly in a two-nymph rig or when targeting trout holding deep.