Flannelette

Flannelette is cotton brushed to imitate wool flannel: a plain or lightly twilled cotton with a soft napped surface raised on one or both faces, warm and cheap. It became the cloth of winter nightwear, sheets, and babies' clothes, the soft cotton you reach for in the cold. Its great drawback gave it a grim Victorian reputation, for the raised nap is dangerously flammable, and a long history of nightgown fires drove the flame-resistance laws that still govern children's sleepwear.