Piece of junk!!! 6 12 months later and mattress has lost all support. It has become very soft instead of maintaining the firmness as advertised. Springs pop and are slack. When sitting on side of bed it compresses down to almost nothing. I wake up in pain because there is not the proper support. My mistake to buy without trying. I passed on other mattresses that far superior at less cost. Even if this had been half the price it would have been too much.