Lets talk about the Castelli AR 4.1 Jersey FZ – The Castelli Aero Race 4.0 became a bit of a classic – this is the jersey that, lets not forget was worn to victory in the Giro d’Italia. It was always intended as a full on race jersey, but it was always just a little bit more. The classy good looks and a cut and fit that flattered tour and non-tour winners alike meant it has always been popular with riders as well as racers. So when Castelli updated the 4 to the 4.1 its this other side of the remarkable jersey that was enhanced. The updated jersey gets a Z collar with a protective flap (this is intentionally offset and dropped) , for added comfort. Out back Castelli have added a zippered pocket to keep your keys safe and angled the other pockets for easier access. The fabric has been updated too. The all new Castelli AR 4.1 Jersey is now really the only jersey you need – whether your sprinting for the race win or just trying to survive the coffee shop ride.