I absolutely love these sheets. Very good quality and super soft. Most fitted sheets I own tend to come off the bed around the edges. I have even tried buying a size up, but that didn't work either. The fitted sheet with this set does not slip off at all. They are made different than others I have. The part that goes over the corners is a wider elastic type band, and its not just at the corners, it goes all the way around, down the sides, and has deep pockets.. These are the BEST!!