Fit & Design: Distinctive cat-eye shape boasts femininity Bio-Resin™ frame is lightweight, durable and reduces Costa's carbon footprint 580P Polycrbonate lenses are lightweight and impact-resistant Polycarbonate and Trivex are the lightest and most durable lenses Technology: Polarized lenses protect against UV rays and filter out unwanted glare C-WALL® is a molecular bond which is scratch-resistant Hydrolite® nonslip, hypoallergenic rubber nose pads and textured temple grips help keep frames secure Additional Details: Manufacturer Limited Lifetime Warranty