I'm surprised how substantial this mattress is! I ordered it then read some of the reviews and have to admit I was a wee bit worried, its firm and taking getting use to, but neither of us have had sore backs since we got it!!! Doesnt look like the picture ( no grey sides) but I really dont care, was a bit late but isnt most things just now, not hypnias fault but online the carrier had marked it as delivered the day before it actually was! I would buy again tho