I cannot believe how wonderful this mattress is. I've heard that the right mattress can change your life and now I know it's true. I sleep better than I have for many years and wake up feeling rested and with no backache. Super comfortable mattress. My husband is on the larger side and I did not want to feel like I was falling in a hole. With this mattress, it stays flat so the second person doesn’t feel like they’re rolling downhill. Top is very comfortable and your sink in a little bit like a memory foam.I highly recommended everyone this super comfortable mattress.