This feathers are hand selected to provide the finest quality CDC available. They are harvested from mature birds and cold dyed to preserve the natural quality of the feather. Straight stemmed and supple, easy to wind and very dense. There are 50 feathers to a pack. These feathers (also known as Cul De Canard) come from the preening gland area of ducks, they contain a natural oil that gives them a natural floatation unique to these types of feathers.