All ‘wood‘ bed! NO particle board. It’s extremely solid and sturdy. Does not feel like a boxed home assembly piece of furniture. Very impressed. Assembly requires a little patience, a power drill to expedite the process of attaching the wood slats (spacing is under 4 inches between each slat and 3 - 2”x2” cross members), very stable! Definitely easier with 2 people. Absolutely recommend this bed frame.