The Collaborative International Dictionary of English v.0.48:
Haircloth \Hair"cloth`\ (-kl[o^]th`), n. Stuff or cloth made wholly or in part of hair. [1913 Webster]WordNet (r) 3.0 (2006):
haircloth n 1: cloth woven from horsehair or camelhair; used for upholstery or stiffening in garments [syn: haircloth, hair]