An "invisibility cloak" is a theoretical garment that can render the wearer unseen to the naked eye. It is often associated with science fiction, particularly in stories like Harry Potter, where characters use such cloaks to hide from others. The concept has inspired real scientific research into materials that can bend light around an object, making it appear invisible. Researchers are exploring the use of metamaterials, which are engineered to manipulate electromagnetic waves. These materials can potentially create a cloaking effect by redirecting light, allowing objects to remain hidden. While true invisibility is not yet achievable, advancements in this field continue to spark interest and innovation.