Ray Ban Caravan RB3136 Sunglasses Gray Gradient Mirror GreyOriginally launched in 1957, Ray-Ban Caravan sunglasses are a streamlined, geometric model and an alternative to the classic Aviator Sunglasses . The Ray-Ban signature logo is displayed on the nose pads and lenses. The Caravan features Square Sunglasses lenses and frames, as opposed to the teardrop lens shape sunglasses seen in the Aviator.Wear Caravan RB3136 sunglasses in a gunmetal, gold or silver metal frame and lens treatments including crystal green solid, crystal grey mirror or prescription.