Zinus 9" Metal Box Spring with Wood Slats, Mattress Foundation, Twin

I wasn't quite sure how I was going to like the metal frame but because of the wooden slats i love it. It actually had my memory foam mattress on regular slats, but then I added this Frame and it made all the difference in the world. My firm mattress Became softer and I was actually able to sleep on it. I couldn't believe it. This is my second one, I ordered a shorter one for my full size bed, I'm just waiting to get the mattress for it. I also have a 4-in memory foam topper on top of my mattress which also helps. I can't believe I waited so long. With the height of the bed frame the height of the memory foam mattress and the memory foam topper it's just absolutely the perfect height for my antique cast iron bed.