This how to video shows you how to pack a suit. First, start off with the jacket. Fold one half inside out. Take the other half and tuck the sleee into the other. The shoulders should be lined up and straight. Pop up the collar and then stuff the shoulders with your socks. Pack the area below it with underwear. Fold the sleeve over and then roll it down tightly. Now you will not have creases on your jacket. For the pants, fold it in half and make it as dense as possible. You should be able to add more pants and shirts in it. A fleece jacket also helps. Fold it up or roll it. When you place the two items in your suit case, make sure it is snug enough to not move in it or too tight that it will cause wrinkles.
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