The dependable difference for the casual user. Light weight, durable performance for moderate use on carpets up to " thick. Easy-glide rolling surface provides effortless chair movement. Studded design secures mat from moving while protecting carpet from caster wear, spills and heavy traffic. Smooth beveled edge for easy carpet to mat transition. Free and Clear non-orthophthalate, non-cadmium formula promotes a healthy work environment while offering exceptional clarity and durability.