The RS-2 is a versatile fly pattern designed to imitate callibaetis, blue wing olives, and midges. Available in various colors like black, dun, purple, and Adams gray, this fly features a slender body, forked tail, and an emerging wing that closely resembles small mayflies and midges. The RS-2 excels as an emerger, can be used as a dropper fly in two-fly rigs, and is perfect for sight fishing wary trout.