It wasclaimed by the ad that the sheetsto fit mattressesup to17 inches, which iswhy I boughtthem. Unfortunately,they do not fit the sides because my mattress despite it being only14 inches deep. In addition, when I think soft jersey, I imagine soft and fluffy, whilethese onesare not. My friend got a set of Great Bay Jersey ones for me, and they are fantastic. These are enough and will work wellforthe winter season.