From Maui Jim, these Women's Pua 55mm Polarized Square Sunglasses feature: Monel & acetate Square frame Single bridge Adjustable, silicone nose pad Traditional pin hinge Sizing: Medium Lens Treatment: MauiGradient® Lens Material: SuperThin (ST) Glass - SuperThin Glass provides the absolute crispest optics available. 32% thinner and lighter than standard glass, it offers the best scratch resistance. Polarized: PolarizedPlus2® lenses eliminate 99.9% of glare, block 100% of harmful UV, and absorb harmful HEV, while enhancing colors Rx able Approx. 55mm lens - 21mm bridge - 140mm temple Imported.