Whats the real advantage of wearing a cycling jersey with a full zip, is it actually for ventilation, or is it just so pseudo-pros can show off their fancy top-of-the-line gear on Sunday morning group rides. When youre already going at a snails pace, does it really make a difference in thermoregulation or is it just an excuse to wear the latest fashion trend? Do the benefits of a full zip jersey actually outweigh the drawbacks of added complexity and increased likelihood of getting caught on the bike, or is it just another example of the cycling industry convincing us that we need more and more advanced tech to be taken seriously?