Adamantine Armor [Адамантиновый доспех]
Доспех (средний или тяжёлый, но не доспех из шкур), uncommon
Recommended cost: 101-500
Armor (medium or heavy, but not hide), uncommon
This suit of armor is reinforced with adamantine, one of the hardest substances in existence. While you're wearing it, any critical hit against you becomes a normal hit.
Source: D&D System Reference Document 5.1, © Wizards of the Coast LLC, licensed under CC BY 4.0.