Pappy’s #1612. The Voice throws a special cellophane cloak over himself and becomes invisible. The character is prophetic. According to several sources* technology is making such an invisibility suit a reality.
I doubt that total invisibility (as in the fantasies I used to have as a junior high kid wondering about the girls’ shower room), is achievable, but in some form, who knows? High-tech camouflage might work for soldiers hiding on a battlefield in plain sight. Some claim the technology is here now, but I'd have to “see” something invisible to believe it.
*We all believe everything we read and see on the Internet, eh?