Suggesting that Shimano's 105 drivetrain is only useful for the casual or sportive rider is an unfair mischaracterization of the redesigned group's Dura Ace and Ultegra pedigree. The same is true for the Japanese manufacturer's Explorer Jersey, which is the go anywhere, do anything, and ride any damn way you please entry in Shimano's cycling jersey line. The 105 comparison goes beyond just the jersey's function, as it also benefits from some trickle down tech namely the Heat Ventilation System inherited from the Performance series. The system takes advantage of the airflow trickling across your shoulders and helmet and down your back while you're cycling. Instead of just providing an open port for cooling air to run through, Shimano suggests that it actively harnesses that airflow, cooling you where the sun hits hardest. The Explorer Jersey also outdoes its more expensive counterparts in many ways. The wiping surface for cleaning your glasses and a dock for when you want to take them off are both missing from the Performance line. Ditto the silicone grip at the shoulders, which maintains a firm hold on bag straps so you don't have to cinch them down to the point of constricting blood flow in order to keep them in place. The jersey includes the standard loadout of three rear pockets and a fourth, zippered pocket for secure storage of personal effects. It's finished with reflective detailing and a hit of silicon grip at the rear hem.