Ray-Ban Chromance RB3671CH 186/K8 sunglasses combine Chromance polarized lenses with a slim metal rectangle frame for improved color, contrast and everyday glare protection. Key attributes: Black | Dark grey | Metal | Polarized lenses | UV protection | Enhanced color and contrast (Chromance) | Prescription lens compatible | Anti-reflective treatment | Rectangular frame | Matte black finish | Slim metal temples | Dimensions & fit: Lens width: 60 mm | Bridge: 16 mm | Temple length: 140 mm | Standard fit | Composition & care: Metal | Glass/Plastic lenses | Wipe lenses with a microfiber cloth; avoid abrasive cleaners; store in protective case when not in use.