I'm not entirely sure why, but my mattress is big. It's the deepest one I've owned by far and, until recently, that meant that fitted sheets never stay in place, and even ping off during the night, disrupting my sleep.
However, during my reviews of the best bedding brands recently, I was introduced to extra-deep sheets, and they solved all my problems. I now swear by my deep fitted sheets from The White Company, but I recently spotted that Habitat has an extra-deep fitted sheet, too. It's worth mentioning that the former will set you back £65 for a king-size sheet, while Habitat's comes in at a cool £28.
