Designed with ergonomics in mind, this mat readily adapts the worker to the workstation by providing comfort all day long. A long-time favorite, its 3/8" thick, super resilient, Nitricell sponge base is a special Nitrile rubber/PVC compound designed for comfort and long life. The vinyl surface if you need extra chemical resistance or want yellow safety borders for your work areas. Has safety edges beveled with a 1/2" overall thickness.