Barbless Parachute Blue Winged Olive BWO Dry Fly - 6 Flies Size 20Premium barbless hooks for easy catch and release and for those waters where regulations call for barbless only flies. The Blue Winged Olive or BWO is one of the essential dry flies of all time! One of the best mayfly and general flying aquatic insect imitations ever tied This classic favorite dry fishing fly is excellent for catching trout, bass or panfish. 6 hand tied dry flies on premium hooks Size 20 The BWO Mayfly hatches are important hatches