I fault either Staples or the shipping point. This mat had to be cleaned top & bottom with 409 and a rag. It was too dirty to think about putting it on my carpet. Looked like it was the top mat on a stack in some warehouse. The delivery person probably got dirty handling it!!!!
Chairmat is way too thin. A chair makes depressions & your stuck & can't roll. Eventually the depressions will disappear. I am only glad I was able to buy two these mats while they were half price. I wouldn' buy another one though.
I have bought several mats like this at the same Staples store over the years. This is the worst one. It was also the cheapest. So no shock there. The last one I bought was the premium one for about double what I paid for this one. It lasted several years and worked much better. This one has had curled edges since day one. Don't buy this product.