Encyclopedia article from the 11th edition of the Britannica describing felt as a fabric formed by matting wool, fur and hair fibers. It distinguishes woven (thread-structure) felts from true fibre felts, reviews the early history of felt in Asia and the ancient world, and outlines manufacture: mixing, willowing, scribbling, carding, ironing, fulling. It also covers hat felts and impregnated felts such as asphalted roofing felt and iron-felt, with British manufacturers named.