When looking for an outerwear piece to lightly throw on over an inner layer during the in-between seasons, what details and fit are you looking for?

When looking for an outerwear piece to lightly throw on over an inner layer during the in-between seasons, what details and fit are you looking for?

• Something that can switch between a high neck and an open collar
• Find me a vintage fake leather jacket
• A jacket to throw on comfortably loose with an oversized fit