The Mario Vs Bowser Trucker Hat is made from a blend of polyester, nylon, and 8-bit goodness...and you don't even need to blow on this thing to get it to work! You might have to hold the restart button in though for a little bit depending on how dusty things are. Where was I? Oh yeah. The Mario Vs Bowser Trucker Hat! It is flatbilled, adjustable through a snapback function, and shows off the titanic struggle between Mario and Bowser from the original Super Mario Brothers!