Minecraft wiki entry for Defeating_a_bastion_remnant, associated text: As mentioned above, the high amount of damage that piglin brutes deal causes a huge damage reduction from armor. To mitigate this, bring either diamond or netherite armor, as in addition to the extra Armor the sets give, both give an extra stat called Armor Toughness, which reduces the severity of any damage reduction caused by an attack. Using a full set of diamond armor halves the damage reduction that you receive - while a full set of unenchanted iron armor would only reduce damage by 22% in Hard mode [(armor points x 4%) - (damage x 2%)] = 60% - 38% = 22%, diamond armor reduces damage by 61% [(armor points x 4%) - (damage x 1%)] = 80% - 19% = 61%.