The chair mat that I purchased was one that should work well with high pile carpets. It crawls and bunches up when it crawls up against some thing such as a desk. I wish I had'nt bought it. Not happy with the purchase. It needs to be twice as thick to be stable enough.
In the store the deeper the carpet pile rating the longer the spikes on the underside are. The one that I received has really short spikes on it. maybe 1/8" long. It came in the late afternoon. I received a call at work and told him that he could leave it outside. my wife found it all crumpled up by the door. It was not in cardboard for protection. it did not want to lay on the floor with the spikes down since that's the way that it was bent up. I finally forced it down & over the last day has leveled out. The problem now is that as you sit in the chair in front of the desk it puts indentations in the mat. Then it becomes a pain to roll around when you need to
Product is nice and thin yet overall heavy which gives a good impression of durability. My dismay is the condition in which it was delivered. The shipping tape residue was the easy part to clean off. The long black ink type streaks not only on outer roll but within the roll were a dickens to remove. Also had red ink marks which were tough clean off. The roll was not wrapped in paper sp therefore it was dirty as if driven over in the warehouse. Was this used before? Having to clean this before placing down was an inconvenience not expected especially for the price.