Sturdy wood. Easy to assemble, However there are two metal flat rectangular pieces with two holes in each end that did not fit the holes already drilled in the lounge chair. I am not sure if I will need these pieces, but I may be able to salvage them if I drill a new set of holes in the lounge chair to fit the holes in the metal piece. I shouldn't have to do that to make it fit. Manufacturer needs to look at this to see why this doesn't line up. I purchased a recommended UV resistant Cushion to go on top, as the surface of the lounge chair is quite hard. I would rate this a 4 overall.