Whether it's a chilly air-conditioned office or a cool, breezy night, there are more than a few occasions where you'll need an extra layer this season. Our pick? The summer blazer. It's lighter and brighter and looks as great at work as it does over a sundress. And, lucky for you, we've handpicked 10 awesome toppers perfect for even these dog days. Whew! Just looking at these babies will make you feel instantly cooler.