The fabled unicorn in Jolly Roger form. Seen here as a Glow in the Dark Cat Eye, the unicorn has been depicted in many a tale as a white horse-like animal with a single horn.“Cat Eyes” have been in use the US military for decades. Anyone who has ever used a helmet band or patrol cap knows what these are. They can be used in pairs or individually. Our Cat Eyes are a high grade of non-toxic, durable PVC. The hook backing allows the Cat Eye to be fixed to any loop swatches found on headwear, packs, plate carriers, webgear and more.