I have several memory foam mattress in my house. I ordered this in a 10 inch full. I prefer a firmer mattress but this like sleeping on a rock! I ordered a different zinus 10 inch twin and its probably the most comfortable thing I've slept on in a while. Perfrct combo of cush and firmness.This was a huge miss for us though. It's way too firm and I wake up sore all over.