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Designed to imitate a stonefly, hopper, or caddisfly, the Crystal Stimulator, Olive has proven itself to work in a variety of dry fly fishing situations and demand a spot in every trout fishing fly box. Hollow hair and ample hackle allows this fish fly to ride high and even hold a fairly heavy dropper fly. Whether tossing it during a hatch or using it as an attractor fly this pattern is always worth a few casts.