Next comes the duvet cover -- to put the comforter inside -- it is easiest with two people. We recommend laying the duvet out flat on the bed with the opening at the bottom. Then determine which way the down comforter goes in (generally with a king, there are more squares going across the bed then up and down). Each person takes a corner and you insert that corner into the corner of the duvet cover, bringing the cover down the sides of the duvet. Being short, I personally like to stand on my mattress and shake the down comforter from the bottom where the buttons are.