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. Studded bottom surface for superior gripping power on carpets.