From Maui Jim, the Noni PolarizedPlus2® Round 54mm Sunglasses feature:  Round shape Monel, acetate, and stainless steel frame Single bridge with adjustable, monel metal encased in silicone nose pads Traditional pin hinge SuperThin Glass - Provides the absolute crispest optics available. 20% to 32% thinner and lighter than standard glass, it offers the best scratch and solvent resistance PolarizedPlus2® lenses eliminate 99.9% of glare, block 100% of harmful UV and absorb harmful HEV Rx able Approx. 54mm eye - 20mm bridge - 145mm temple - 4mm base curve  Two-year warranty Imported.