"Polyester fiberfill filling material has become well accepted as a reasonably inexpensive filling and/or insulating material for filled articles, such as pillows, cushions and other furnishing materials, bedding materials, such as mattress pads, quilts, comforters and duvets, in apparel, such as parkas and other insulated articles of apparel and sleeping bags, because of its bulk filling power, ae" . . . . .