Hi, for hot weather is there a particular company that is producing the best material and shirts for road racing/touring ?
For racing, by definition the best company is the one that produces your team kit, and since changing suppliers is enough of a PITA (not unlike our supplier's shorts BTW), you are most likely stuck with whatever somebody chose way back when...
(Me, I like Giordana, but I couldn't possibly tell if it's just the clothes or that subtle product placement on "Friends" aeons ago.)