Advantus RecyClear Chair Mat for Carpets up to 1/2-Inch Thick, Recycled, 45 x 53 Inches with 25 x 12 Inch Lip, Clear (AVT40121) Clear mat made using 100% post-consumer recycled PET material from water bottles, soda bottles and packaging PVC and BPA-Free 45 x 53 inches with 25 x 12 inch lip 2.2 mm thick with gripper cleats for use on carpet up to 1/2-inch thick carpet All of the features of polycarbonate mats, but 20% less cost