'DX' means deluxe, and with 'Crimson Night II,' you feel the quality the moment you put them on. They’re even more durable and comfortable than our 'Millenia X2' style, with a stronger frame and a new metal core for enhanced adjustability. They're more scratch-resistant, too, thanks to our premium, polarized PureBlend™ Lens. It all makes for the best-feeling, best-fitting 'Millenia' shades ever, in a striking red-and-black colorway.