These anti-fatigue mats are designed to provide comfort and durability in a variety of harsh conditions. FOB Shipping Point. • Comfortable - High-density nitrile-blended cushion helps eliminate pressure to the lower back and legs, providing superior comfort. • Safe - Certified high-traction by the National Floor Safety Institute (NFSI); sloped edges provide a safe transition from floor to mat. • Durable - Nitrile-blended cushion provides years of useful service life; cushion is molded, not glued, to the nitrile rubber surface so it will not separate; edges will not crack or curl. • Versatile - Welding safe; ESD rating of electrically conductive; chemical resistant; surface is grease/oil proof and cushion is grease/oil resistant. Available in 5/8" or 7/8" thickness with solid black or with OSHA-approved caution yellow borders on two sides. See (Related Items) tab for Hog Heaven® Matting.