The OFM Essentials Collection 46" X 60" Chair Mat for Low Pile Carpet protects carpeted floor surfaces. This mat is perfect for low pile carpet as it features gripper-back cleats that are suitable for carpet up to 1/4" thick. The non-slip back surface features ramped edges that allow for easy on/off rolling. This generous sized mat measures 46" x 60" and is 2. 2 mm thick. You can feel confident in your purchase as this mat is CAL 117 compliant. The mat weighs a hefty 11. 46 lb, which means it's sturdy and will stay securely in place. The mat is backed by the OFM Limited Lifetime .