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Product Description Designed to Dale Earnhardt Jr.'s exact specifications, the Dirty Mo is your first place trophy no matter how you finish. Comes with the SPY Happy Lens, the only color and contrast enhancing lens technology that maximizes the transmission of the sun's "good" rays—while still blocking out its "bad" rays—which studies suggest fosters an uplift in mood and alertness. From the Manufacturer The Spy brand has an obsession for progression. The Spy DNA melds their action-sports heritage and youth energy with an obsession for fashion-forward styling. They are at the intersection of retro-futuristic design and optical innovation.