Ray-Ban RB3721CH 186/5J Sunglasses combine Ray‑Ban heritage styling with Chromance polarized lenses for enhanced contrast and glare reduction. Ideal for all-day outdoor use where clear vision and UV protection matter. Key attributes: Black | Metal | Polarized lenses | UV protection | Chromance enhanced contrast | Prescription capable | Spring hinges | Square frame | Full rim | Metal frame | Dimensions & fit: Lens width: 59 mm | Bridge width: 17 mm | Arm length: 145 mm | Lens height: 45 mm | Size: 59-17-145 (XL) | Composition & care: Frame: Metal | Lenses: Polycarbonate