Recently bought a new firm matress that is stiff as a board. My back has been hurting so bad that I was sleeping on the couch. Found this memory foam cover at the cheapest price on overstock and has been the best buy I have ever made. My husband and I would highly recommend this product to everyone. My back has stopped hurting and I am getting the best sleep I have had in a very long time. The foam does smell slightly but took the advice of other buyers comments and did air it out for a day.