Ray-Ban RB4181 Sunglasses pair a classic, clean acetate frame with crystal-lens options — including polarized variants — to reduce glare and boost color contrast for everyday wear. Key attributes: Black | Nero | Acetate | Polarized lens option | 100% UV protection | Reduces glare and increases color contrast | Comfortable fit | Signature temple shape | Suitable for all face shapes | Clean, elegant lines | Slightly curved front | Classic Wayfarer-inspired profile | Dimensions & fit: Lens width: 57 mm | Bridge width: 16 mm | Temple length: 145 mm | Comfortable fit | Suitable for all face shapes | Composition & care: Acetate frame | Crystal lenses | Clean lenses with a microfiber cloth; store in the supplied case when not in use.