A waistcoat or vest.
It's just essential for fall/winter if you want to impress the ladies, channel a bit of English style, or get more out of your dark colored suits.
- Tweed is meaty enough to work in cold weather
- A vest is more dapper than a professorial sweater vest or Mr. Rogers cardigan
- You can still wear it with your suits...duh!
- Go bargain, mid-tier, or high-end
{original photo from GQ removed}
