Of course! In order to try and make sure we offered as many creative assembly options as possible while making sure we had traditional character loadouts available we've divided the typical RPG classes into the categories of light, medium, and heavy.
With the light category think of this as the stereotypical caster classes who don't sport a lot of armor such as wizards, sorceress, or perhaps even monks.
Medium will be more along the lines of the lightly armored classes such as druids and rangers.
While the heavy version will be those classes who tend to utilize a lot of armor such as fighters and paladins.