Abstract: A shelter structure having improved aerodynamics is provided. The shelter structure comprises a body having a first portion and a second portion, wherein the second portion is a cabover portion that extends from the first portion over and above the vehicle propulsion system and cockpit. The cabover portion may comprise at least a contact surface and two opposing lateral sides. At least one airfoil may be strategically positioned proximate the abutment of the contact surface and one of the lateral sides and pulls air away from the contact surface and redirects such air along the respective lateral sides in a non-turbulent manner, such that at least one airfoil reduces a high air pressure zone that may form on the contact surface proximate the respective lateral side during forward travel of the associated vehicle at sufficient speed, which thereby reduces the aerodynamic drag.