I have a single vest which is solemnly used in spring/autumn while it’s too cold for only a suit jacket but not too cold to carry a winter jacket or similar. As

I have a single vest which is solemnly used in spring/autumn while it’s too cold for only a suit jacket but not too cold to carry a winter jacket or similar. As the vest is significantly more lightweight and smaller it’s worth it if you are on travel (think airplanes or public transport).