There is always a problem: what to take with, and what would be provided on place?
How it is with towels in saunas in Germany? Do you have to take a sauna towel with you? Or the towel is rented in price? Or maybe you don't need any towel inside sauna, and outside you can use your own towel, which don't have to be full size (for example, 80x60 would be enough)?