— Core Mechanic
Anyone can wear armor that fits them, but it takes some training and acclimation to be fully nimble and not encumbered by the armor. Armor Proficiency represents if you’re comfortable in the type of armor, of which there are 2: Basic Armor and Advanced Armor.
While wearing armor you’re not proficient in, you become sluggish, receiving disadvantage in Dexterity Checks and Saving Throws, and losing a quarter of your Speed. Some types of armor might not be wearable for those not proficient, just as sci-fi power armors.
