RollaMat Frequent Use Chair Mat, Medium Pile Carpet, Flat, 46 x 60, Rectangle, ClearA status statement for the mainstream specialist. Superior performance. Studded design secures mat from moving while protecting carpet from caster wear, spills and heavy traffic. Medium weight chair mat for frequent use on carpets up to 1 2" thick. 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.