Best goddam cycling clothing I ever bought me (nice english huh?)
Lightly water resistent
Breathable
Arms come off into gilet
Windproof
Fine 'Next to Skin' so only need a baselayer for almost all weathers
Fast drying
Good cut
Always seems to just work right in most conditions. No boil in the bag feeling, full zip in case you get too warm. Perfect.
Seconded on Gore kit - my jacket (sorry can't remember the exact model, but it's a good 4 years old now) does everything. It's kept me bone dry in some really bad weather and rolls up super small.
Get a decent long sleeve technical t-shirt if it's really cold, but a short sleeve is normally fine