Why is Primoz Roglič racing the Tour de France without socks, and why does it even matter?

Cycling, oddly, has a strange obsession with socks. The best cycling socks are as much a fashion statement as a comfort or performance item. They can even be a statement of intent in the case of aero socks.

Pro riders at the Tour de France almost exclusively wear aero socks now, with their ribbed fabric offering claimed wattage advantages. The flipside is that aero socks, on the whole, tend to be less breathable.