Whether you have an overnight business trip or a weekend shopping trip planned, a black blazer is always your friend. A perfect layering piece for chilly air conditioned places — like the airplane or a restaurant — it will instantly transform your look to say polished and professional, or cool and sophisticated, depending on the style of jacket and what you pair it with. A piece worth investing in, we’ve found 10 black blazers you’ll want to pack on your next trip.