I often go back to swinging Wet Flies in the old timy manner when the condition are right. It can be a great way to imitate stages of a hatch of Mayflies, Caddis or small baitfish . Originally tied by a Yellowstone National Park guide Frank Beals, who supposedly would shake with anticipation on the morning of a fishing trip. Used to imitate the Isonychia (Slate Drake) or October Caddis.