Mat Depot Presidential Beveled Edge Chair Mat, 36 x 48 inches, 1/3" Thick, Clear LIFETIME WARRANTY AGAINST CRACKING AND DEFECTS Cheap, discounted mats can be a poor investment. Each brand new mat comes defect-free with a guarantee of high-performance and durability for an affordable price. STAYS IN PLACE Molded cleats prevent mats from sliding around on your floors and carpets while you roll your chair on top of a smooth surface. EASE OF MOVEMENT The lightly pebbled design offers you one of the smoothest rolling experiences you need to allow you to move freely while reducing leg fatigue at the same time. LASTING PROTECTION Protects low-pile carpets, such as loop or berber over 1" thick including padding; great for moderate use in home and office.