They always shrink. Yes I use a tumble dryer for bedding which I know doesn’t help. I buy ‘deep fitted’ but the one I have is torn at the edge where the sheet is stretched.... is it worth spending a lot of money on one? If so which ones? Does the thread count make a difference? I have a divan so a deep mattress with a mattress protector on it abs currently my electric blanket so must be deep fitted!