Like the real thing, Ninjas can appear and disappear in a flash. You'll have to be quick to get one of these cat eyes. A ninja was a covert agent or mercenary in feudal Japan. The functions of a ninja included espionage, deception, and surprise attacks. As specially trained spies and mercenaries, they appeared in the 15th century during the Sengoku period, and may have existed as early as the 12th century. These special merc-warriors are now in our popular "cat eye" form. Our company Founder introduced the "Cat Eye" in this hook and loop format around 20 years ago and has been designing them ever since. PDW makes the best in class.“Cat Eyes” have been in use the US military for decades. Anyone with a helmet band or patrol cap knows what these are. Our PDW Cat Eye is an evolution of these useful elements and allow the user to discreetly mark their personal gear with a removable glow in the dark (GID) element. They can be used in pairs or individually. Our Cat Eyes are a high grade of non-toxic, durable and inert material known as TPU. The hook backing allows the Cat Eye to be fixed to any loop swatches found on headwear, packs, plate carriers, webgear and more. Limit one per customer.