When you pack your clothes, there are a few things to keep in mind. First, Germans tend to dress slightly more formally than Americans—so bring clothes that look more put together, as opposed to sweatpants, ripped jeans, belly shirts, athletic wear, etc. You will not see many Germans wear shorts unless it's very hot out. Second, Germans wear slippers inside the home, so you may want to bring your own pair (flip-flops are also fine for the summer).