very convenient, good to kombienieren, not too loose at the bottom. Especially the Flip Flops is pleasant and does not cut into. Of course, and remain there Birkenstock, they see not just look cool, but just eco, but has this been properly combined and you know it, too beforehand. The color is universal and can be combined super. What I really like about Birkenstock - through the cork are my feet are not cold - and I otherwise always cold feet! Strong buy recommendation.