Sucks...don't buy. Worst I have ever had. This was placed on top of a commercial tight weave carpet...sucks. Chair divited so bad it could not roll. Honestly the carpet was better than the mat. WASTED $$$.
The plastic is not very thick so there are indents from the chairs wheels. otherwise it makes it easier to roll around. also protects carpet it was nice to have a choice of sizes. Store manager wrapper it in a roll so it was easy to carry.