Buy Ray-Ban - RB4181 Polarised - Square (Polarised Solid Colour Brown) at THE ICONIC with Free overnight delivery and Free returns! The Ray-Ban RB4181 sunglasses are a simple yet elegant design with polarised lenses for maximum protection. These sunglasses are prescription friendly and look fantastic on all face shapes.- Polarised dark brown tinted lenses - 100% UV protection- Square, tortoiseshell-patterned frames - Moulded nose pads - Branded arms with curved temple tips - Prescription friendly