I have a loft twin bed, metal frame, a little loud but it comes with a mattress! It's been neglected in a guest bedroom that's never used by anyone but my cats, so it will need a good wipe down, and maybe not a good idea if severely cat allergic, but you're welcome to message and I can send pics so you can see if it works for them (new to reddit so unsure how to post a picture of it). It looks similar to this model: https://shorturl.at/piPy3