Offer a protection solution for hard floor and Low Pile carpet,The edge of the floor mat is polished to prevent you from accidentally crossing the edge during use. Made of PVC, measure 1.8mm in height, it contains no polyvinyl chloride, no volatile toxin, no special odor, for a healthy indoor environment. Smooth surface allows your desk chair to glide easily over the mat, and the mat keep in place at the same time.