|| With four interchangeable lenses--one polarized--to choose from, you can adapt your sunglasses to any sport or lighting condition! 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 three additional sets of lenses for a total of four sets of lenses. Non-polarized, additional lenses are ideal for low- and medium- light to night time conditions. Thermoplastic Grilamid(TM) frames are shock-resistant, lightweight, non-allergenic and used for stability and durability. Scratch- and impact-resistant Carbonic(TM) lenses use Tapered Lens Technology from Smith(TM) to provide distortion-free vision. Hydrophilic Megol(TM) nosepiece and temple ends become tackier when wet for reliable grip during exercise and hot weather. Soft storage case included.