Fans of vintage Revo styles rejoice! Sierra's timeless and flattering small round, 90’s eye-shape is a tribute to Revo's best-selling style from its iconic H2O Collection. A crown jewel of Revo's heritage, Sierra blends a hand-made acetate frame with advanced NASA-based polarized Crystal glass lens technology for sunnies that not only look good, but feel even better. Sierra is a smaller fit and features a classic keyhole bridge with spring hinges to hold it comfortably in place. Revo's polarized Crystal lens technology enhances your view from scenic coastal drives to sunny mountain cabin porch swings to a round of golf while protecting from glare.