Press board essentially, so it’s very thin. Very cute and looks like quality from afar, but I do have concerns on long term durability. Paint job and assembly design is great. One handle hole didn’t line up though. Easy fix with a drill. 
It was very inexpensive, for a two pair pack of end tables, so I wasn’t surprised with what I got. It will work very well for my guest room where the tables get  very little use, and more importantly they make the room look great!