These matts are reversible with one of our beautiful prints on each side. The outer layer is a PUL with a cotton filler and quilted together for strong durability. The PUL gives a nice water resistant layer making them perfect for indoor and outdoor play with easy clean up. They come equipped with a matching strap with a button that makes it easy to fold up. They are roughly 4.5ft x 4.5ft give or take 1-2 inches.