Kneeling Pad Length 22 In. Width 12 In. Thickness 1 In. Nitrile/PVC Sponge Blend Rubber Backing Squared Edges Black Features Laminated Rubber Surface To Protect Foam From Absorbing Water Oils Liquids. Also Protects it From Gravel Stone and Concrete. Built-in Handle is Easy to Carry or Hang On Tool or Maintenance Carts For Maintenance Workers Plumbers Electricians HVAC Workers Roofers Can Be Used When Kneeling On Gravel Asphalt Concrete Dirt Oily Surfaces or Grass