Not too sure
I don't really like to leave non positive reviews, and I've only been sleeping on the mattress for about 3 weeks now, but I want to be honest about what I've experienced so far. First, it took a long time for the smell to dissipate. Each morning for an entire week, I had to take the sheets off, wash them, let the mattress air out all day and then put the sheets back on. I have severe sciatica so hoped this mattress would help - it hasn't, at all. It was very uncomfortable and I finally had to turn the mattress around. Turning it helped somewhat but I have yet to get a restful sleep. I actually wake up now with neck pain. Thought maybe it was the pillows so I bought new pillows. Hasn't helped. For the price, and how it's advertised for back pain, I had high hopes. I'm not quite ready to give up yet though. I hope, just in case, Level stands by their policy of being able to return the mattress.