I don't know where I learned how to do this folding of the sheets, but it must have been about 40yrs ago. The only difference is that I put the flat one and the pillowcases inside the fitted sheet before the last fold over. That keeps the sets together. I have a set of flannels for Winter and 1200ct (like satin) for Summer. I must confess (these days) that most of the time I take them straight from the dryer and put them back on the bed during each Season. :roll: