Costzon 36"x48" PVC Home Office Chair Floor Mat Studded Back with Lip for Standard Pile CarpetANTI SLIP Design Studded designed to achieve a strong grip without piercing or damaging your carpet floor to prevent mat from slipping. Smooth Surface The unique surface texture facilitates easy movement of the chairs. You can carry out daily tasks conveniently and freely with its gripping to maintain controlled rolling so the chair doesn't skid around. Floor Protection This floor mat can well protect your floor from scratches caused by the friction