So I went in search of a round brush with the largest possible diameter. The "Olivia Garden" range appealed to me immediately - if only because of the immense size selection. Now I have it eindlich, my "Olivia Garden" -brush with 83 mm inner diameter and they will not easily give up. The winding of the hair is much easier and faster and also the dry season, thus also protects the hair. What then still absolutely convinced me was the perfect result - as fresh from the hairdresser. And all in just 20 minutes.
Incidentally, I once had even brushes with natural (boar) bristles tried, which was a total letdown. My fine hair have placed in winding only the bristles and not enclosed the aluminum core of the brush as it actually should be. I looked like a "plucked chicken". This just for info, to facilitate any decision between plastics and natural bristles.
The "Olivia Garden" -Rundbürste I can also friend because of my longstanding hairdryer experience!