If your bottom sheet is fitted, simply slip the corner pockets onto the ends of the bed and adjust the fitted sheet around the perimeter underneath the mattress pad and mattress. If your bottom sheet is flat, arrange the sheet so that 1 foot of sheet hangs over the edge of the top of your bed. Beginning with the sides of the bed create hospital corners and fold under the mattress and mattress pad. Continue on each side, creasing and folding as you go.