Unlike most Gear, Armor cannot usually be changed during the Strategy Phase. Armor can only be equipped or removed outside of scenarios (or in scenarios where the DM explicitly allows it; this is most common in exploration). The DM may note if it is impossible to change armor even outside of a scenario, particularly for more complex heavy Armor that can take some time to properly don or remove.
Training is required to equip Armor. Armor comes in light, medium, and heavy classifications; training in the labeled classification is required to equip the Armor. Armor training is typically provided by a Class.
Armor can be enhanced by adding an Enchantment. Armor Enchantments usually provide additional bonuses to the character and/or their base Reaction rather than directly modifying the Armor's text.
For more information, see Player's Guide Chapter 7: Gear and Wealth.