They are very desirable due to the look that you get from using dacron. Your cushions will look like the first day your purchased them. There will be no wrinkles, no deflated cushions and they will look crisp and clean.Wrap it around a cushion and the fibers will stand vertically to hold its body and shape better than any polyester wrap in the market. Now, you only need one type of wrap to put over your foam before you cover it with fabric.