Thanks to their polarized lenses there is absolutely no glare, no eye strain and no squinting - you'll love 'em! Plus, the lenses are made from TAC (tri-acetate cellulose) technology for enhanced contrast. Also features UV 400 protection that blocks 100% of UVA and UVB rays, solid aluminum frames with anodized black finish and spring temple hinges. Cleaning cloth and hard shell hinged case included. * If you are not completely satisfied with the Baja Beach™ TAC difference, simply return it within 60 days for a full merchandise refund.