Mark Zuckerberg Walking That Billionaire Walk

9/20/2013 12:02 AM PDT

Mark Zuckerberg
's ginormous wealth can be traced back to 2 facts: 1) He spends next to nothing on clothes ... and 2) He has major rich guy swag in his stride.

Yeah. Facebook might have a little to do with it too -- but don't undersell dude's wardrobe and walk.