Cortland&';s Royal Wulff Assortment This is a classic dry fly pattern that has been one of the most effective in history. Very effective for trout, steelhead and salmon. Fished as a dry fly on the surface of the water. Use Cortland Dry Fly Spray to keep the fly floating high. This pattern can also be skated across the surface of the water for terrific takes. a 4 Packaged Dry Fliesa Usage: Rivers / Lakes a Hook Size(s) #10, #12 & #14