Mithral Armor [Мифрильный доспех]
Доспех (средний или тяжёлый, но не доспех из шкур), uncommon
Recommended cost: 101-500
Armor (medium or heavy), uncommon
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.
Source: D&D System Reference Document 5.1, © Wizards of the Coast LLC, licensed under CC BY 4.0.