We recently started using canvas duck fabric to make Saarinen tulip chair replacement cushions. It is very durable and will instantly bring to mind the feel and look of canvas or Sunbrella. We Scotchguard each cushion to protect against spills and stains. It is 100 percent cotton with a zipper on the bottom in the classic design. For the inner foam we use 3 inch high density foam (15 year). Available in a medley of far out colors!