Deflecto SuperMat Clear Chair Mat, Medium Pile Carpet Use, Rectangle With Lip, Beveled Edge, 36 x 48 Inches (CM14113COM) Protective clear vinyl chairmat prevents wear and tear on your chair and extends carpet life Durably built for frequent daily use, more than 6 hours per day, over low or medium pile carpeting up to 1/2" thick Studded bottom surface provides superior, non-skidding gripping power over carpet. Extended lip provides protection while your chair is rolled under your desk Smooth beveled edge enables easy carpet to chair mat transition at home, office or any commercial environment Free and Clear non-phthalate, non-cadmium material formula promotes a healthy work environment, while offering exceptional clarity and durability