Armor (Warrior Cats Supplement)
From D&D Wiki
Cats are unable to wear nor make armor. D&D 5e is balanced around different armor types. The solution: cats use different defensive stances. To D&D veterans, yon may choose to remain the old name of armor as they are practically the same.
At the start of the day, choose one of the stances you know. You can change your stance after short or long rest.
If you are using an official or non-warrior cat class, the conversion is simple. Light armor is light stance. Medium armor is medium stance. Heavy armor is heavy stance. Shield proficiency is lost.
At 10th level, all stances increase ac by 1.
When in light stance, your ac is 11 + dexterity modifier.
Medium Stance (Stealth)
When in medium stance, your ac is 13 + dexterity modifier (max 2).
Medium Stance (Protection)
When in medium stance, your ac is 14 + dexterity modifier (max 2). You have disadvantage to stealth checks.
When in heavy stance, your ac is 16. You do not add dexterity to ac. You have disadvantage to stealth checks.
At 20th level, heavy stance's base ac is increased by 1.