Geek Tropical offers two different types of buttoned shirt styles: 'Hawaiian' and 'Button Down' / 'Button Up' shirts Hawaiian Shirt: A classic Hawaiian button up closure and camp collar (also known as the Cuban collar) – a perfect shirt for everyday wear or business casual work settings. Button Down Shirt: A more dressy look with a straight collar and button down closure complimented with a top button - great when you want to pair the shirt with a tie or for any type of event, casual or formal.