Goose down is most often used in pillows and comforters. In both cases it is injected into cloth already formed into the pillow or comforter shapes during the manufacturing process. Different manufacturers use different blends of goose feathers to give their product certain qualities. The blends use down from a variety of different goose species.
Alternatives for goose down are sought for several reasons. Those with strong beliefs against animal cruelty object to the way geese are raised and treated, and buy alternatives to express their views. Others buy alternatives to cut down on the growth of mites or allergen problems. Allergens and microscopic organisms such as mites appear to be more attracted to the goose down than substitutes. Some substitutes may also be cheaper than down.
Synthetic fibers are created from synthetic compounds and used to line the inside of pillows and comforters instead of down. There are several different brands that specialize in the production of synthetic materials designed to mimic the feel of goose down, including Primaloft, which is designed to function the same when wet as when dry. These options are the most hypoallergenic, but may not please others worried about eco-friendly production. Polyester derivatives are also used.
Wool is used more often internationally than in the United States, but is a common natural replacement for goose down. There are many different kinds of wool that can be used, ranging from alpaca to sheep. Wool fibers are naturally more organism-resistant than goose feathers.
Natural fibers such as silk and cotton are also used as filler material for comforters, although these are not as common for larger fills such as pillows. These natural fibers do not lose their lift as easily as down, and tend to be easier to clean and more resistant to mites.