With this summer heat, we don't suggest any layering. Whatsoever. It's insane. On days with climates that top triple digits, it's totally acceptable to throw on a simple cotton T-shirt and look fashion-forward. But if you need more flair than a regular crewneck, here are The 15 Best V-Necks of Summer 2010. No pause-worthy, deep, man-cleavage Vs here. For that, try your nearest lady mag.