dimity

parkkumi puhekieltä A light strong fabric with woven stripes or squares. (defdate)
(quote-text)
1831, John Murphy, A Treatise on the Art of Weaving, Glasgow, http://books.google.com.au/books?id=M3MDAAAAYAAJ&pg=PA42&dq=%22dimity%22%7C%22dimities%22&hl=en&sa=X&ei=BwdgUd3LO-eSiQfWlICICQ&redir_esc=yv=onepage&q=%22dimity%22%7C%22dimities%22&f=false page 42,

The first of these tweels, in respect to the number of leaves, is the dimity cord, which is merely the three leafed tweel turned, a plan of which is subjoined, both for cording and treading.

Period slipcovers were typically made of linen and cotton, in woven checks or striped dimities.