A V-neck visually lengthens the neck and slims the face, so it flatters men with a shorter neck or broader build. It is also comfortable if you do not like fabric close to the neck.

What does slim fit mean for a long-sleeve top?

Slim fit is a close cut that follows the chest and shoulders. A slim fit long-sleeve looks good on its own and under a blazer, but leaves less room for a layer underneath.