These things work like a hot damn! I bought some adult mayfly and stonefly patterns of various colours and sizes, Frosty Fly gave me a grasshopper sampler on top of my order to top it off. All of those flies have proven their worth. You know when you get fish that moves on your fly but either misses it or refuses it. Change to some of the realistic patterns these guys make, you will almost get another eat every time. I fish tiny, slow moving brown trout streams so if they work there, they must do just fine anywhere else!!