CDC Natural are the best on the market, natural, not dyed feathers CDC in seven attractive colors. The undoubted advantage of the CDC is excellent buoyancy, so they are the perfect material for constructing the wings of dry flies. You can use them to create an imitation of wings for huge mayflies on the hook no. # 6 and "chaff" for # 22. It is hard to imagine hunting for autumn graylings without flies designed from CDC. CDC feathers can also be used for winding bodies of dry flies and nymphs.