It came folded and I was concerned because it was bent but it laid flat within a few hours of rolling over it! One thing... the large label that is glued to the bottom of the mat... there's got to be a better method of putting this label on. It did not come off and unless I want to scrub it off the label shows as a huge white blob under the mat.
This mat was just the right size to fit under my desk. The back has a very low profile grooved finish that holds it in place on my carpet--it does not have the individual pointy protrusions so it will also be good for hardwood floors. I liked it so much I am buying one for my home office.