Years ago, Ray-Ban took the Erika and made it metal. Now, they're taking these popular frames to the next level with Evolve lenses. Ray-Ban Erika Metal RB3539 Evolve Sunglasses for Ladies feature round, oversized polycarbonate lenses are polarized to block 99% of reflected light. Light-sensitive Evolve photochromic lenses provide excellent visibility with any kind of light exposure, getting darker or lighter with sun exposure to perfectly shade your eyes. The lenses also protect your eyes from UV rays. The thin metal frames on these Ray-Ban women's Erika sunglasses deliver a structure that is both lightweight and resilient. These Ray-Ban sunglasses are outfitted with adjustable, rubberized nose pads and temple tips for just the right fit, and come with a cleaning cloth and case. Manufacturer style #: RB3539. Lightweight polycarbonate lenses are impact-resistant Light-sensitive Evolve photochromic lenses for excellent visibility with any kind of light exposure 100% UVA and UVB protection Metal frames with keyhole nose bridge and ultra-thin temples Adjustable, rubberized nose pads and temple tips for just the right fit Includes cleaning cloth and case