Mithral Armor

Armor Type: Any Medium or Heavy Armor

Mithral is a light, flexible metal. A mithral chain shirt or breastplate can be worn under normal clothes. If the armor normally imposes Disadvantage on Dexterity (Stealth) checks or has a Strength requirement, the mithral version of the armor doesn't.

Classes

Artificer
Barbarian
Bard
Cleric
Druid
Fighter
Monk
Paladin
Ranger
Rogue
Sorcerer
Warlock
Wizard

Magic Armor

Common
Uncommon
Rare
Very Rare
Legendary

Armor Types

Light Armor 
Medium Armor 
Heavy Armor 
Shields