Invisible cloaks are materials designed to make objects appear invisible or less visible to the human eye. They work by bending light around the object, a process known as metamaterials. These materials manipulate light waves, allowing them to flow around an object instead of reflecting off it, creating the illusion of invisibility. Research into invisible cloaks has advanced significantly, with scientists exploring various applications, including military uses and privacy protection. While fully functional invisible cloaks are still in development, prototypes have shown promise in small-scale experiments, demonstrating the potential for future technologies that could change how we perceive visibility and concealment.