Apparently "The Hangover" was a huge hit amongst my friends. A lot of people are saying great things about it. I wanted to watch it this past weekend, but I was out of town. However, I was able to figure out and find what type of sunglasses Zach Galifianakis was wearing during the movie.

"He has on a pair of demi tortoise nylon Blublocker sunglasses. These glasses are known from TV infomercials, and are very inexpensive. It's the most popular model of Blublocker, and only recently became available in this tortoise color.

These Blublockers have temples made of memory retention nylon. The temples stretch and contract to fit any size face and the pin hinges are thick and durable. The large lens provides ample protection and the nosepads are molded into the frame itself."

Got the description from the website that identified the sunglasses.