Tower Shield

Tower Shield (+3)
Armor (shield), heavy (30 lb.)
requires Heavy Armor Proficiency and 16 Strength
disadvantage on stealth checks

A person wielding a shield of this size who does not have the feat "Shield Master" rolls all their attacks with disadvantage. An individual who doesn't also have the "Heavy Armor Master" feat cannot use their bonus action to try to shove a creature within 5 feet of them and has their movement speed reduced by 5 feet, if they do have the feat they roll the push with advantage.

(Barrier) An individual who has the feats "Shield Master" and "Heavy Armor Master" can also as an action on their turn set the shield down and crouch behind it for total cover from a specific direction but lose the AC from all other directions until the start of their next turn and any bonuses to saving throws. They are considered blind of any action directly in front of them and cannot take a reaction against a creature in front of the shield. A person who sets the shield down as an action cannot use the "Protection" Fighting Style until they have equipped the shield again as a bonus action. However when a person with the "Protection" fighting style uses their reaction to impose disadvantage on an attack role against a target other than themselves the target gets a +1 to AC versus that attack.

Additionally individuals wearing non mithril heavy armor other than chain mail have their speed reduced by 5 feet.