Sturdy and heavier particle board/composite wood. Unit also takes a little longer to put together than most Wayfair items and you need a power drill or it certainly helps otherwise it would take much longer and be harder to put together. Also, this is supposed to go with the Meteo Low Profile bed which we also purchased, but the Justine nightstands sit nearly a foot below the bed which obviously makes them challenging and uncomfortable to use. I'm going to go and buy wheels for them to adjust the height, so make note if you're interested in these.