This seemed like a solid trundle bed for the price. As I was just starting to assemble it, I realized that the mattress we had intended to use in the trundle was too thick. At the time I purchased this in December 2022, the product page did not mention the maximum mattress height. As of this writing, it does mention that the trundle can handle a mattress up to 6" in height. Bummer for us, but this would likely be a great solution if you have the right sized mattress.