Happy Lens is Spy Optic’s own lens technology, not a coating you bolt on after the fact. Spy tunes the lens to boost mood and alertness while sharpening color and contrast, so the world looks brighter and more defined through it than through a standard tint, and it ships built into the lens rather than sold as an add-on. Several models also pair it with Spy’s ARC polarization, which cuts glare off pavement, glass, and chrome. If you want to see how a lens technology like this stacks up against Smith’s ChromaPop, our ChromaPop guide covers the comparison.