From Maui Jim, these Unisex Island Eyes 50mm Polarized Round Sunglasses feature:  Unisex Titanium and acetate insert Round frame Keyhole bridge Adjustable, silicone nose pad Traditional pin hinge Sizing: Medium Round lens Lens Material: MauiBrilliant™- MauiBrilliant™ is Maui Jim’s most advanced lens material that features optics nearly as clear as glass with just one-third of the weight. Polarized: PolarizedPlus2® lenses eliminate 99.9% of glare, block 100% of harmful UV, and absorb harmful HEV, while enhancing colors Rx able Approx. 50mm lens - 18mm bridge - 145mm temple Imported.