The carpet pads were rolled up loosely and I did not notice the sticker that said it is intended for use on unpadded carpet. When I got home I left the pads in my garage until the next day and when I attempted to unroll them they had become wrinkled and misshappened by the heat in my garage. After leaving them in the sunlight they were OK and I saw the sticker. Bad choice on my part because my carpet is padded.
Just too thin. Hard to roll on wheel sink way in. My old one was a little thicker enough to support the wheels fine but it cracked after years of use. Bought that one at Staples also.