The majority of fillers used in down alternative comforters are synthetic, using materials such as polyester and microfibers. These fillers are designed to mimic the weight and warmth-preserving properties of down feathers. Some manufacturers use fillers with hypoallergenic properties to further enhance the quality of the comforter.
Regular detergents, both liquid and powder, contain harsh chemicals that will break down the fiber filling and eventually destroy the comforter's loft. Furthermore, alternative down comforters should never be dry cleaned, as the process will also harm the filling materials and reduce the quality of the comforter. Use mild baby detergents, hand-washing detergents or detergents specifically designed for washing down and down alternative items.
Where you wash your comforter depends on its size. Smaller comforters can be washed in a residential washing machine; however, larger comforters should be washed in a commercial machine for best results. Downlite, a manufacturer of down alternative products, recommends stuffing commercial machines to their full capacity to protect the filling material from being beaten up by the harsh spinning and extraction cycles. For all machines, set the cycle to "Gentle" and the water temperature between cold and medium.
Drying is the most important stage of cleaning down alternative comforters. Set the machine on a low to delicate setting, less than 120 degrees Fahrenheit, and cycle the comforter as many times as it takes to get it completely dry. During the drying process, take the comforter out of the machine periodically, and flip it around so that all portions are evenly dried. Avoid excessive heat, as this will destroy the filling material and may also scorch the outer fabric.
To preserve the life and condition of your down alternative comforter, avoid washing it more than twice per year. For additional protection, cover it with a duvet to keep dust and dirt from soiling the outer shell. Fluff the comforter regularly to keep the filling from settling.