Tribes 3: Rivals features a class-based system. Each class specifies what type of armor you have, along with what weapons and items you can carry. Classes can support up to three weapons, a melee weapon, a pack, and a belt item.
Classes
Light Armor is extremely fast and is best suited for flag capping and chasing. It may be outfitted to fill sniping or infiltration roles.
Medium armor finds the balance between speed and survivability. It may also be outfitted to fill base building/repair or base disruption roles.
Heavy armor is extremely resilient and is unmatched in long range bombardment capabilities. It may be outfitted to fill Heavy on Flag or base destruction roles.
References