IMPACTO® X-STANDING MAT. Heavy resilient closed-cell foam standing mat. Does not absorb liquids, impervious to petroleum products, silicone free. Designed for severe surfaces such as steel, concrete, gravel, grating, wet surfaces, dirt and mud, 16X28X3 inch, with beveled edge with bright safety lines. Self-extinguishing material meets 49 CFR 571.302 flammability standard.