This Home/Office BPA Phthalate Odor Free 30" X 48" Opaque Chair Mat for Hardwood Floor made from polypropylene chair mats is BPA free, PVC free and Free From Harmful Toxins. Chair mats made from polypropylene are heavy duty and protect your floor to prevent everyday wear and tear caused by office chair casters, for effective floor protection at a fraction of the cost. With the users needs in mind, these mats are ergonomically designed to allow for effortless movement of office chair castors (wheels), in turn helping reduce stress in the workplace and also reducing leg and muscle fatigue. A non-slip backing provides complete stability and holds the mat firmly in place while in use. Suitable for use on all hard floor surfaces including wood, laminate, tile, stone and vinyl.