|| Smith introduces a new twist to their interchangeable lens system with an intuitive way to switch your lenses in any sport or lighting condition! With the new Interlock Interchangeable system, simply rotate a temple to slightly open and close frame for lens changing. Polarized lenses reduce 99% of visible glare from water, snow, sand and pavement for increased visual acuity and decreased eye strain. Each frame includes one set of polarized lenses (tint depends on frame color) and two additional sets of lenses for a total of three sets of lenses. Nonpolarized, additional lenses are ideal for low- and medium light and nighttime. Grilamid(R) TR90 lightweight nylon frames offer a consistent fit and flexibility in all temperatures and are extremely impact resistant. Scratch- and impact-resistant Carbonic(TM) lenses use Tapered Lens Technology from Smith(TM) to provide distortion-free vision. Tapered Lens Technology(TM) progressively tapers the lens toward the outer edge, allowing distortion-free vision. Hydrophilic Megol(TM) temple ends become tackier when wet for reliable grip during exercise and hot weather. Best fits a small face. Protective storage case included.