From Maui Jim, the Cruzem PolarizedPlus2® Round 57mm Sunglasses feature:  Lightweight square design shape Nylon frame Saddle bridge with embedded rubber 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. 57mm eye - 16mm bridge - 139mm temple 8-base curve  Two-year warranty Imported.