I have a 3-foot mattress PU cover that encases a 3-foot mattress. It is a medical-grade PI cover that has a heavy-duty zip. This is an excess cover; it has no rips or tears in it and is as new. It is a wipe-clean vinyl cover from foam for Comfort Company.
Photo later, but it is just as I have described. To go as soon as possible. It measures 5 .5 inches in depth, and it stretches to 6 inches for a tight and crease free fit it is a stretchy vinyl that needs to go today before recycle day. Sorry for the short notice