Yes.

White duck down is a type of down and is a part of down. The filling in down jackets is usually white duck down. Down is a mixture of feathers and velvet. Feathers are the hair pieces, which play a supporting role in the down and allow the down to rebound quickly. Down is the velvet, which is the collection of the body of the down and the feathers. The loftiness and warmth of the down are It's all decided by cashmere.