A great thing to go is Metzingen. It's a very small town (about 14000 ppl live there) but there are about 20-30 factory outlets in this one little city. It all started 10 or 15 years ago with the Factory Outlet of Hugo Boss. Metzingen always was famous for the Hugo Boss Outlet and at the weekend there were ppl from allover Europe in town (you could tell by the licence plate) After Hugo, Bogner started to have a factory Outlet there as well, and then i think Calvin Kline. And maybe 3 years ago, there were suddenly all famous brands, Tommy Hilfiger, Strenesse, Escada, Jilsander, Nike, Joop, Polo Ralph Lauren, Benetton and also Shops like Esprit. I usually just buy some Stuff at Esprit or some of the cheaper Stores, (Esprit Shirt for 9 EUR instead of 25 or 35 EUR, and you get the same clothes as in any Esprit Shop, but mostly things are sold out very fast, means don't expect that they have ALL the things readily available, but what is there is cheap.) Of course buying a Hugo Suit for 600 EUR instead of 1400 EUR is great, but it's still 600 EUR for a suit. Oh, Metzingen is not near here, it is near Stuttgart. About 250km (2-3h). I don't know if it's worth it to go there, unless you wanna buy a suit. I also bought pullovers, a leather Jacket for 40 EUR (instead of 220,-), a suit for 200 instead of (400,-) but it's hard to find these kinda things, especially when you only have one day. I go there from time to time because my parents live there. But now at least you know about this Outlet City. Cheers!
i got a huge boss suit too from that outlet, but you have to watch out too 'cause some of the items are second-quality, meaning they have little things wrong with them. still i paid €150 instead of €400 for mine and it is horrilby crowede on teh weekends. you an actually sign up for a bus ride to that mall.