Diamond-Plate SpongeCote[R] Proves the old adage that two is better than one. The Nitrile enhanced Nitricell sponge is twice as thick but still absorbs repeated compression and bounces back to its original form better tan PVC sponge alternative. Tough abrasion and chemical resistant PVC surface. Diamond-Plate pattern for improved traction. Machine cut and beveled edges prevent tripping. Doubles the defense against productivity robbing fatigue. Overall thickness 9/16".