All of the magazines and fashion webs list celebrated brands' newly launched sunglasses for spring 2013. For men, I think Dior may be the best choice. They design the sunglasses with simple, brief frame. And this season they do make some changes with the color, they have more choices for you to choose.
In a word, you can be cool, steady and fashion with Dior sunglasses.
But I still suggest you to go to shopping mall to have a look, and choose the suitable one for yourself.
You know the suitable one will be the best one of the style of the eyeglasses. However, the classic ones will never out of date with men's glasses. The vintage style will be the trend for the several years. As my personal opinion, with the less decorations and exaggeration style glasses will be more suitable for men, if he is not a Fancy pants guy. The modest and wisdom appearance will be the safe style in every occasion.
The nerd glasses could also be the hot types in 2013. With the black frames, the nerd glasses are so fashionable at the design. The quality of it is also perfect which will be durable for you to wear for many years. If you want to buy one type of the fashion glass for your boyfriend, you could just choose the nerd glasses for him.