Developed by Rim Chung to trick some of the most selective trout in the West (Dream Stream, South Platte, Colorado), this fly is justifiably notorious. No tailwater fly selection should be without it! The name evolved from Rims first version, the RS-1 and RS stands for Rims Semblance, which imitates an emerging baetis beautifully. It is so simple and effective no tailwater guide risks being without a version of this iconic fly.