That is Automask

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Fuel saving figure in hot weather ( 38- 40*C)
1- You can reduce at least 10% fuel consumption in full-occupants mode
2- Reduced 25% fuel consumption in single occupant mode (a driver only) for sedan, and much more for SUV, MPV or bigger vehicle...
due to reduction of Air conditioning workload(*)

* A/C system normally consumption about 4 HP of Engine Power.Bigger space required more cooling time, thus increased engine workload and fuel consumption, especially, in Hot Running Climate.
Other knowing about linking fuel consumption with A/C usage on your car, go to
http://www.nrcan.gc.ca/energy/efficiency/transportation/cars-light-trucks/buying/16740

and  Bon appetit...