Medium Armor Expert

You (and your mount) have practiced moving quietly in medium armor to gain the following benefits:

• Wearing medium armor doesn't impose disadvantage on your Dexterity (Stealth) checks.
• When you wear medium armor, you can add 3, rather than 2, to your AC if you have a Dexterity of 16 or higher.
• Your expertise confers to your mount as well, enabling it to wear barding of medium armor without having disadvantage on Dexterity (Stealth) checks and allowing it to add 3, rather than 2, to its AC if it has a Dexterity of 16 or higher.