Down feathers unlike normal feathers are usually found on the belly of ducksgeese and have a light fluffy texture needed for insulation enabling the birds to keep warm. What is Down Alternative. Down Alternative Comforter Tarragon Comforters Guest Room Bed Matching Bedding And Curtains Down Comforter vs Down Alternative Comforter The Company. What is an alternative down comforter . The differences come from the materials used weight care instructions and even the effects they have. The Brooklinen Down Alternative Comforter is a standout product thanks in part to its selection of weight options. As the name suggests down comforters are filled with down a natural material found on ducks and geese. It is said that the warmth of down comforters cannot be duplicated with synthetic materials however our PrimaLoft Deluxe and TCS Down-Free comforters use the finest synthetic. Down alternative is usually a synthetic fiber like polyester and its often less expensive and easier to cl...