Typically lasting twice as long as PVC foam anti-fatigue mats, these nitrile-blended foam mats are designed to withstand grease, oil, and chemicals. FOB Shipping Point. • Comfortable - 5/8" nitrile-blended closed-cell foam provides excellent anti-fatigue properties. • Durable - Diamond-pattern surface provides increased durability compared to ribbed surfaces which tend to peel and shave. • Safe - Beveled edges provide a safe transition from floor to mat; certified high-traction by the National Floor Safety Institute (NFSI). Grease and oil resistant; chemical resistant. See (Related Items) tab for Cushion Select - Custom Lengths.