Not exactly sure what the Black Wrap is for. Mark was sporting it while leaving a building in Beverly Hills today.

But I'm exactly sure that 'Lone Survivor' was Fucking Awesome!!

Update at 7:33pm PST

From my workout guru Brother-in-Law:

Btw That mark Walburg tape is a stretchy tape that helps with joints, tendons and muscles. He probably has an issue with his elbow or forearm