When my husband and I first got married, we lived at my brother in law's temporarily. He had a dog that got onto our mattress one day while the sheets were being washed - this has left some stains that I cannot get off - despite many, many attempts. I bought this mattress cover to cover the unsightly stains, but also to add some support to our bed, which is pretty soft. I was hesitant to buy this because the price seemed unnaturally low - but I am so glad that I did. It has added the perfect amount of support to our bed.