This mattress has been incredibly disappointing. We gave it three days (one more than recommended) and it never rose to the image in the picture. It is half that thickness.
There doesn't appear to be any memory foam present, just the ever present coils, hurting your back, hips, cocyx, making sure you can only sleep on one side for three hours or less before the tell tale pain begins and it's time to disturb your sleep and turn over night after night after night, again and again and again. Really disappointed as the bed frame I purchased  from Wayfair is perfect, this mattress is so far from that it's almost funny. 7 layers are not here, maybe 3, 3.5 at best.