We had this mattress for one year, one month and had to purchase another mattress because this one was so bad! It significanly sunk in and never regained its form. It had no support. My husband had to help me out of bed at times because it sunk in so bad, and we are not overweight people. Do not waste your money on this inferior product. We are so disappointed Overstock would sell such a terrible product. However, we did contact customer service with our concerns and they were very helpful. This mattress also held in heat and we often would wake up sweating.