Nothing and for sure not my good armor !
i would wear a wetlook catsuit or a vinyl catsuit with no panties or bra....
i short top and shorts :D
Have done dunk tanks and my clothing of choice is what i think a good target would be.
Mostly Shirt / tie and pants
and i have done t-shirt and blue jeans as well.
For most occasions anything that your FULLY CLOTHED attracts more people than a swim suit. But there are some cases that a swim suit is better.
A full body condom