Apache Mills ArmorStep Anti-Fatigue Mat, 1/2-Inch Thick, Black, 3-Feet by 5-Feet Outlast traditional one layer foam mats 3 to 2 Limited 3-year warranty against wear and delamination Dual density foam is a great cost effective alternative to other laminated foam based products Resists common chemicals and fluids Two layer foam with an extra-tough surface layer provides amazing, long wearing durability. Outlast traditional one layer foam mats 3 to 1. Dual density foam is a great cost effective alternative to other laminated foam-based products. Resists common chemicals and fluids. Limited 3-year warranty against wear and delamination.