A one-page encyclopedia entry defining felt as a stuff of wool, fur, or hair whose fibers are entangled and interlocked. It covers the ancient history of felt, the legend of St. Clement, how waste wool is felted by machine with heat, moisture, and beating, and its uses for carpets, hats, garments, boiler covering, and roofing. It also briefly describes making hat felt from fur such as nutria, raccoon, beaver, and rabbit.