Herco 4' x 6' Vinyl Sponge Anti-Fatigue Mat - Grey Ergonomic anti-fatigue mat designed to provide comfort and relief for aching feet and legs. Ribbed surface pattern improves grip, comfort and productivity. Beveled edges for safety. Ideal style for home or office. Available in three colors to suit any dcor and environment. High grade 3/8" thick closed cell PVC sponge for comfort and durability.