Ultimate Diamond Foot Black with Yellow border mat 4'x75', 15/16" thick with ErgoFlex foam backing material; this matting offers the ultimate standing comfort. Surface is made from 100% recycled materials & resists common fluids, most chemicals and is non-flammable. Insulates feet from cold, concrete floors. Reduced impact on joints. Minimizes stress on ankles. Spark resistant, excellent for all welding applications. Beveled edges for added safety. Limited 3 year warranty against wear and delamination.