Tommaso is a metal bench.‎Frame/top: Black phosphatized sheet steelCharacteristics and maintenance instructions:BIG IRONY products have intentionally not been painted becauseit is the surface irregularity the characteristic which makes them sospecial.‎ The daily use will form stains forming a patina which rendersthe surface even more beautiful.‎ To clean it use a non aggressive/soft detergent as it would be wood.‎