Barathea is the cloth that hey make PC's from, they also make Argyll's from it it is wool. Here is what wikipedia says:

Barathea, sometimes spelled barrathea,[1] is a soft fabric, with a hopsack twill weave giving a surface that is lightly pebbled or ribbed.[2] The yarns used cover various combinations of wool, silk and cotton. Worsted barathea (made with a smooth wool yarn) is often used for evening coats,[3] such as dress coats and dinner jackets, in black and midnight blue. Silk barathea, either all silk, or using cotton weft and silken warp, is widely used in the necktie industry.[1]
[edit] References

1. ^ a b Frank P. Bennett (1914). A Cotton Fabrics Glossary. Guilford, Ct.: Frank P. Bennett & Co.. pp. p. 684. http://books.google.com/books?id=QSl...#PRA7-PA684,M1.
2. ^ Turnbull & Asser. "Barathea weave". http://store.turnbullandasser.co.uk/...hea_Weave.html. Retrieved 2008-11-03.
3. ^ Flusser, Alan (2002). Dressing the Man: Mastering the Art of Permanent Fashion. HarperCollins. p. 278. ISBN 0-06-019144-9.