From Maui Jim, these Women's Violet Lake 53mm Butterfly Sunglasses feature: Front Material: Titanium with acetate rim Temple Material: Titanium with acetate tips Bridge Type: Single Adjustable, ceramic nose pad  Traditional pin hinge  Gender: Female Sizing: Medium  Butterfly lens  Lens Material: MauiBrilliant™- MauiBrilliant™ is Maui Jim’s most advanced lens material that features optics nearly as clear as glass with just one-third of the weight Polarized- PolarizedPlus2® lenses eliminate 99.9% of glare, block 100% of harmful UV, and absorb harmful HEV, while enhancing colors. Lens Treatment: Maui Sunrise Approx. 53mm lens - 21mm bridge - 140mm temple - 48mm vertical - 4mm plano curvature Imported.