What is the clothing Bruce Lee wears in the movie of Enter the Dragon called?

I'm trying to figure out what that piece of clothing Bruce Lee wheres in the Enter the Dragon movie in the begining when he is boarding the boat and when he gets to the island. I wanted to buy one because I wanted to use that as a visual aid for my English research presentation. Plus it looks so awesome. Can you tell me what it is called and where I can buy one somewhere in Southern California.