What is that white headgear Viktor is wearing? It looks like a bandanna but I'm not sure why he would wear that...is it like a sports bandanna that absorbs sweat or is it purely for the aesthetics? I particularly like the way it appears to be knotted together at the back of his head. Below is the link of the video in which he can be seen wearing the headgear:
It seems to me it is a tennis bandana from Yonex (link here). It will absorb sweat too, may be less than a "spongy" headband but I think it's for the style too. A bit of "Nadalization" may be?
