18. The Trench — Just like the pea coat, the trench coat is a great topper to any ensemble and borrows a little swag from those pesky Brits. A great khaki coat makes a dressed-down outfit a bit more sophisticated and a suit just that much more polished. Plus, with this in-between weather, a trench is always a safe bet to keep your warm but not sweaty.

Sandro Magnetic Trench, $685, available at Sandro; Gap Double-Button Trench Coat, $118, available at Gap.