You become more and more proficient with heavy armour as you gain experience wearing it. You gain the following benefits:

• Increase your Strength score by 1, to a maximum of 20.
• From 1st level, while you are wearing heavy armor, bludgeoning, piercing, and slashing damage that you take from nonmagical weapons is reduced by 2.
• From 5th level, while you are wearing heavy armor, bludgeoning, piercing, and slashing damage that you take from nonmagical weapons is reduced by 3.
• From 11th level, while you are wearing heavy armor, bludgeoning, piercing, and slashing damage that you take from weapons is reduced by 4.
• From 17th level, while you are wearing heavy armor, bludgeoning, piercing, and slashing damage that you take from weapons is reduced by 5.