The Superfly Cul De Canard (CDC) is a finely-fibered duck feather with unique floating capabilities. French for ”Duck Bottom,” CDC is buoyant due to its natural oils and does not require additional floatants. Superfly Cul De Canard is often used for tying emergers and dry fly patterns. It can be stacked and tied in as a wing, spun into dubbing loops or used as a dubbing material.