of use of the double duty shade system 10 of the present invention will now be described it will be understood by those skilled in the art that the manner of use of the double duty shade system 10 described herein is merely one method of use and other methods of use of the double duty shade system 10 are within the scope of the present invention the double duty shade system 10 of the present invention is installed by following easily understood package instructions so that motorists can have the double duty shade system 10 ready to work in a matter of seconds the double duty shade system 10 allows vehicles to stay cool while protecting drivers and passengers from the harmful rays of the sun in this manner users can bask in this more natural way of cooling thus eliminating the need to constantly run the car 39 s air conditioning system as a result gas can be saved as well as money moreover the double duty shade system 10 shields sensitive skin from the glaring sunlight that pours in through a vehicle 39 s window the double duty shade system provides ample protection to the many users who must travel for work school or enjoyment the double duty shade system 10 of the present invention is a retractable two part adjustable sun blocking window shade system designed specifically for use on car door windows the design allows the user to open and close the window while the.