I am not disappointed, per se, as this was an inexpensive product.  This qualifies for the "you get what you pay for" category.  While it covers the Parsons chair (and the original twill duck cloth cover from Pottery Barn whose zipper broke after 15 years and many washings...), it is thin cloth (and does not have the strong, stiff feel that duck cloth usually conveys) and will be threadbare soon enough, but for its pricepoint, I will use it until I can replace the original which will cost five times as much.