Zephyr cloth is a thin kind of cassimere made in Belgium. The term also refers to a waterproof fabric of wool. ... Found on http://en.wikipedia.org/wiki/Zephyr_cloth
zephyr cloth 1. A lightweight worsted cloth. 2. A thin kind of cassimere (variant of 'cashmere') made in Belgium; a fine, downy wool growing beneath the outer hair of the Cashmere goat. A soft fabric made of this wool or of similar fibers. also, a waterproof fabric of wool. Found on http://www.wordinfo.info/words/index/info/view_unit/2344/