Upholstered with shiny nylon, like you find on cheap outdoor furniture. Steel bed frame. Easy to put together and it works. Made in same factory as outdoor garden furniture, same fittings. Aluminium bolts easy to cross thread. No bottom to the divan base but it lifts easily, even with a good mattress on it. It’s mostly the rubbish upholstery that lets it down but at least it looks wipe clean…