I often read that a mineral sunscreen with high protection (50+) necessarily leaves a white cast on the skin. That the only way to avoid this is to use nano mineral filters and that it's impossible to do otherwise. It seems that the word impossible is not in the Korean dictionary, because the Korean skincare brand Purito just achieved to do a completely transparent mineral sunscreen, without using any nano filter. Let me introduce you to the Purito Comfy Water Sun Block!