For the madison collection, we began with German-engineered, premium synthetic leather from Skai. Underneath is a top-grade reticulated foam wrapped around a powder-coated aluminum frame. We mount this on 304-grade stainless steel legs. The seats are comfortably slanted to the back and open at the seat to shed water. The cushion bottoms are open mesh underneath for breathability. The aesthetic is 1930s Bauhaus but the materials and construction are strictly 21st century. Supremely comfortable, durable, low-maintenance and a great value.