At first the chair moved effortlessly on mat but now after less than two weeks the castors make indentations on ithe supposedly "medium pile carpet" mat - much the mat this one was bought to replace.. The borders of the mat lay flat on the carpet . Overall it appears I should get a mat for high pile carpet although my carpet is low pile
Great for the carpet. Protects the carpet and lets my chair roll easily at my desk area. I ordered online and had it in 2 days. Great customer service!