Storck Windbreaker Jacket
The Storck Windbreaker Jacket is a very high quality windproof jacket that is surprisingly breathable and keeps a good amount of rain out when you get caught short.
I'd argue that all road cyclists need a good lightweight windproof shell that can easily be stowed away, and this is the time of year when such a jacket comes into its own. The temperature, hell the weather, is all over the place at the moment and knowing what to wear can be a nightmare. Even for more experienced cyclists.