DuraMat Moderate Use Chair Mat for Low Pile Carpet, 45 x 53 with Lip, Clear Lightweight chair mat for moderate office use on carpets up to 0.38" thick, low pile; choose a higher pile chair mat if daily usage is over six hours. Easy glide rolling surface provides effortless chair movement. Free and Clear® non-phthalate, non-cadmium formula promotes a healthy work environment while offering exceptional clarity and durability. Smooth beveled edge for easy carpet-to-mat transition. Studded bottom surface for superior gripping power on carpets. Protective vinyl chair mat prevents wear and tear and extends carpet life.