fiberfill

fi·ber·fill

F0099350 (fī′bər-fĭl′)n. Lightweight synthetic fiber used as filling or insulation, as in comforters, pillows, and outerwear.

fi•ber•fill

(ˈfaɪ bərˌfɪl)

n. synthetic fibers used as a filling or insulating material for pillows, quilts, garments, etc. [1960–65, Amer.]