Three-dimensional affinity displays for removably attaching onto an exterior side surface of a vehicle are presented herein. The affinity display may include an outer shell that helps shield a base surface from wind drag and weather elements while driving, helping to ensure that the affinity display remains attached to the exterior side surface of the vehicle. The affinity display may include aerodynamic features, such as a dome shape, and a drain hole to prevent water from building up within the affinity display. The affinity display may also include a detachable strap to assist with stability, and a recess in the base surface for attaching the strap to the affinity display.