What is the traditional dress for Dragon Boat Festival

So I am doing a project for school on the different outfits and why for each holiday in china that I can find. I was wondering what is the dress for this holiday. I saw in a couple of the other holidays like the spring festival and the new year that you buy new clothes. I see why for the new year but why for the spring festival. And what are the traditional dresses for this. Like the new clothes do they have any requirements for this. And if so what do they have to meet to be the proper dress for these festivals and celebrations. Thank you