Invisibility Cloak
A magical garment known as a "invisibility cloak" made the wearer or whatever it covered invisible. Within the wizarding community, invisibility cloaks were incredibly rare and expensive. When people imagine an invisibility cloak, we picture a fictitious substance that could actually make us invisible. (Or, more likely, Harry Potter comes to mind. Naturally.) Many other prototypes have been tried, but almost all of them either rely on shoddy lighting gimmicks or are too large to be of any actual use.
The only substance that even remotely resembles actual invisibility is Quantum Stealth, created by the Canadian company Hyperstealth Biotechnology Corp. In addition, it has a passive, long-lasting effect rather than generating power or creating an optical illusion to make you appear invisible.
The material is clearly intended to successfully bend light around any type of subject, including massive trucks, based on the company's public videos. Though that information is currently secret owing to potential future military applications, we are unsure of how it exactly operates.