When I had my kit done 20 years ago it was two days afterwards so I wasn't wearing the exact clothing however I did bring both my bra & panties with me. These were put into the kit. As others have said before having clean, comfortable, non-sexy underwear would be a great thing. After undergoing all that's involved with the exam a survivor doesn't have the capacity to think much beyond just trying to get through each moment. The hoodie idea is a great thing too which can give a sense of being less visible. AND sunglasses! If you're in a hot weather environment I would guess that it's likely to be sunny a lot of the time? What better way to be able to shield any residual fear than being behind sunglasses. Finally, drawstrings would be helpful too for the pants so they can be adjusted accordingly. And as others have said - neutral colors and not super high quality as these will never be worn again. Ever.