I wish I had seen reviews of this mattress before purchasing. The "memory foam" is actually only about 1" thick, on top of regular foam that is about as soft as sleeping directly on the floor. The mattress never fully regained the proper shape, and it is basically impossible for a regular human being to sleep on this mattress. However, it has come in handy for my two dogs! If you would like to purchase a large, $300 dog bed, this is for you!