From Maui Jim, the Waterfront PolarizedPlus2® Round 55mm Sunglasses feature:  Round aviator shape Monel metal frame Double bridge with adjustable, non-slip silicone 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. 55mm eye - 18mm bridge - 140mm temple 4-base curve  Imported.