rustic-1.0.5
Botania+r1.10-354

Armor toughness bar does not show any toughness from Terrasteel armor from Botania, when each piece actually has 3 toughness. It could well be something strange about the way Botania is doing armor, as you can't see the durability and toughness numbers on the armor pieces in your inventory, the way you can with vanilla armor.