Divide the group into 2 teams (team of 5 to 8 people).
Designate a start line and a finish line.
Place the suitcases with items on the finish line for each team.
Ask the teams to make a line behind their start line.
At your signal, the first player from each team walks to the suitcase, opens it, puts on all the clothes from the suitcase, shuts it and brings it to the start line. Then, the player removes the clothes he has just put on, puts them back in the suitcase and returns the suitcase to the finish line and returns to give the relay (pat in the hand) to the next player who will in turn do the same thing.