Haircloth is a stiff, unsupple fabric typically made from horsehair and/or from the wooly hair of a camel. Although horsehair generally refers to the hair of a horse`s mane or tail, haircloth itself is sometimes called horsehair. Horse or camel hair woven into haircloth may be fashioned into clothing or upholstery. In the history of brewing, for .... Found on http://en.wikipedia.org/wiki/Haircloth
(from the article `horsehair`) Horsehair fabric, or haircloth, stiff and with an open weave, is usually made with lengthwise yarns of another fibre, such as cotton, and long, ... Found on http://www.britannica.com/eb/a-z/h/5