From GameWatcher: “Code Vein is out now, and it features a particularly excellent and in-depth character customization system – so you can create the exact character you want to see, right down to the shade of their clothes. But the problem is – that’s not the default outfit your character’s wearing, so a Code Vein hide armor option would be great.”
Source: N4G PC Code Vein Hide Armor – Can you hide Blood Veil or Mask?