... and sponge inside the cushions, they are all water proof, the sponge we use for our products is of high density which ... , other manufacturers construct the frame with 1.0mm thick aluminum, but all our products are constructed with 1.2,1.5and 1.8mm ... sofa ect. Quality first, Clients foremost,Welcome to contact us with any of your questions 2013 New rattan home furniture for sale (DH-9535)