This is a smock, DPM Gabardine, buttons up the front. But that old geezer above in the farmer's shirt wihtout buttons is also wearing a smock
It is called a smock because it is a garment that goes over and protects you other clothes when you are doing grubby jobs like crawling around in hedges, for whatever purpose
I'd say cagoule or cag to describe a pull-over type of weather proof jacket.
To add more fun the Services often insist on referring to as a shirt or blouse what ordinary mortals would call a jacket
It is called a smock because it is a garment that goes over and protects you other clothes when you are doing grubby jobs like crawling around in hedges, for whatever purpose
I'd say cagoule or cag to describe a pull-over type of weather proof jacket.
To add more fun the Services often insist on referring to as a shirt or blouse what ordinary mortals would call a jacket