Warm, breathable, packable—a classic vest is one of the most convenient layers out there for staying comfortable when temperatures are tough to predict. Whether you plan on layering one under a trucker jacket, or throwing yours over a buttondown when the AC’s cranked up too high, our collection of men’s vests is ready to always be by your side—just in case. Whenever you could use more warmth (and another interesting layer of texture in your outfit), a lightweight vest will gladly do the trick.