From Maui Jim, these Men's Ka'ala PolarizedPlus2® Square 58mm Sunglasses feature:  Rectangle shape Monel metal frame Single bridge with adjustable nose pads  Spring 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. 58mm eye - 17mm bridge - 137mm temple 6-base curve  Two-year warranty Imported.