The jj cole bundle me seems super popular as winter gear for baby. But am I right that you cannot use it in the car seat in the car? It seems super annoying to take it off for the car and put it on for walks (we use the car seat in the stroller for walks. )

I have a hand me down bundle me, and our car is parked in a temperature controlled garage. Should I still get a "shower cap" style cover? Links?

It's not quite cold enough for these things yet but this is New England- it will be cold soon enough! C is 3 months so will be in the infant seat for most if the winter I would guess.