This means that facing these invisible archers, the enemy's ranged troops have no way to counteract unless a cavalry corps launches a charge, approaches them, and breaks their invisibility ability.
The price of such concealing leather armor is as high as 15 Golden Crowns! It is only slightly cheaper than the fine-level dwarven heavy armor. The Half-Elf territory has 6 tailor shops and a joint armor-making workshop to produce this leather armor.
After Oliver's investment, the Half-Elves saved all the money they would have spent on raw materials, thus expanding production, forming a Half-Elf leather armor guild, controlling all 10 tailor shops and 2 leather armor factories below.
