I have this one from LeCol:
https://lecol.cc/products/aqua-zero-gilet-black
Great slim fit and works well with jersey and arm warmers on cold/windy/showery days. However, be advised: It‘s rather warm and probably too bulky for your average jersey pocket.
On the other end of the spectrum I have one from Vermarc that‘s super thin and foldable, but it barely makes a difference for temperature.