Launched for the first time in 1957, Ray-Ban Caravan sunglasses are a model with geometric and aerodynamic shapes, an alternative to the classic Aviator. The unmistakable Ray-Ban logo is featured on the fins and lenses. Caravan features square lenses and frames, unlike the Aviator series teardrop sunglasses. Caravan RB3136 sunglasses are available with metal frames in gunmetal, gold or silver colors, solid green crystal lenses, mirrored gray crystal or prescription lenses.