The 05+ Mustang Convertible Windstop (windscreen) is designed around the curvature of our Light Bar, but can be used with out it also. This windstop will allow you drive your Mustang for more months of the year! The convertible windstop diminishes air movement and so maintain warm air in the driving compartment. The windstop also reduces the noise level around the driver and passenger by 50%! (This was independently confirmed with the various automobile manufactures through extensive testing.) You can once again talk comfortably on your cell phone and with the other passengers. Traffic reports on the radio become understandable again. Enjoy listening to your favorite music. The Mustang Convertible Windstop is made of a mesh fabric in an aluminum frame; the mesh itself reduces turbulence. The windstop rests on the rear trim panels behind the lightbar and is held in place with two adjustable quick-release straps. No modification is needed to either the car or Lightbar! When not in use the Mustang Windstop can be quickly unbuckled, folded, and stored in the trunk in its protective storage bag (included). The convertible windstop does not impair rear-ward vision. It complies with all the safety regulations of the car manufacturers.