The Smith Founder has a square lens shape and a precise fit. The Polarized Lens filters out harmful UV Rays for great clarity and optimal protection for your eyes. Best Use: Fashion, Lens Material: Carbonic TLT, Frame Material: Evolve Material, Polarized: Yes, Face Size: Medium, Nose Pads: Yes, Warranty: Lifetime, Lens Type: Polarized, Model Year: 2018, Product ID: 435847, Frame Shape: Round, Model Number: FOCPGNBK, GTIN: 0715757527624