If you are using it on a hard floor or very thin carpet it will probably will work for your chair. Otherwise if you have even cheap short carpet it doesn’t do well at all. Not a good item.
Mats came with a large label stuck to the outer surface. They peeled off easy enough but left a stickly glue residue. Have some Goo-Gone and wipes available. Took multiple applications to get all the glue off.