Trajically, we do not have them here in America.
Most Helpful Guy
It's a thin layer of chocolate. Inside is a huge, cloying morass of nougat, and on top of that is some chewy caramel. It basically turns into a disgusting, sickly bolus inside your mouth as you chew and attempt to swallow.
You can buy a Milky Way for the same experience, since the ones in the US are almost identical to Mars Bars.
TL;DR: Snickers without the nuts0