This shirt supports youth racers! Buying this shirt helps us sponsor moto kids so they can make it to the races and pursue their passion. Support patramoto so we can support more youth racers! Math has never been easier than 1+1=Dirtbike! Let's face it - dirtbikes are probably the coolest steed you could ever straddle and if you ride one, you're as rad as they come! If you want to rep with the platypus, all you have to do is get yourself and someone special in your life a 1+1=Dirtbike tee!