Ray-Ban RB4068The Ray Ban RB4068 642 57 in Havana is one of our Ray Ban best sellers. The cool and contemporary frame shape combined with the traditional tortoiseshell frame colour looks not only stylish, but also very sophisticated. This particular model is available with crystal brown polarized lenses. Ray Bans unique polarized lenses not only offers glare reduction but also reduces eye strain, increases visual clarity and the brown colour improves colour