... all water proof, the sponge we use for our products is of high density which ensures the durability, but ... with 1.0mm thick aluminum, but all our products are constructed with 1.2,1.5and 1.8mm ... Sofa Series:outdoor sofa,indoor sofa,rattan sofa,wicker sofa,compound sofa,combination sofa,single sofa, love seat,corner sofa, leisure sofa, sofa bed, round sofa ect. Outdoor furniture all weather rattan sofa