Havana Sunglasses with Brown Gradient Lenses-RB_4181_710/51. Ray-Ban ��_��__ RB4181sunglasses are a simple yet elegant design. The injected larger plastic frame is both comfortable and stylish with crystal lenses in Polarized and Gradient lens options. A Ray-Ban logo decorates the lens and temples of these Sunglasses. These sunglasses are prescription friendly and look fantastic on all face shapes.