There is no edge and it cut crooked; with that the chair rollers pick up the edge of the mat and will not go on it. Waiting to return it but I don't have the receipt.
much better than the smaller thinner "economy" mat I origianlly bought. The cheaper mat became brittle discolored and started breaking/shattering in the center where the chair sits most. This new mat is much thicker and more flexible.
We are on burber (spelling?)carpet and the pad is so soft the chair creates deep marks in the pad which take a great amount of time to raise back up. The old one I purchased from your store about 10 years ago was fine---it held its shape like it should. This one will not last very long.