SuperMat Frequent Use Chair Mat for Medium Pile Carpet, 46 x 60, Clear, Sold as 1 Each Studded, vinyl and beveled chair mat for medium weight carpeting. Protective vinyl chairmat safeguards and protects carpets from wear and tear. Medium weight chairmat for frequent use on carpets up to 1/2"" thick, Medium Pile. Choose a higher pile chairmat if usage is over 6 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.