The Aqua Sphere Vista Mirrored Lens Swim Mask not only look great, it also offers advanced UV protection and optimized visibility during those late morning swim workouts. This mask utilizes an AFT enhanced silicone skirt for a comfortable fit that doesn't slip. The new buckle system integrates a new pivoting technology providing two important benefits: structural stability and fit. A Patented curved single lens provides wraparound, 180° visibility. The Aqua Sphere Vista Mirrored Lens Swim Mask are perfect for sunny conditions.