Much of the roof and window glass of the Natalia SLS 2 sport luxury sedan will be made of Vario Plus-Sky glass from American Glass Products Company. This glass uses revolutionary SPD-SmartGlass technology developed by Research Frontiers Inc. The following demonstration shows how this glass changes from transparent to opaque, or anywhere in between, through electric control by the passengers.

First, move the slider on the right to see how the automobile interior darkens with reduced sunlight. Then click on "How does it work" to see a diagram of the glass. As you again move the slider, watch the diagram to see how particle orientation within the glass changes to modify the amount of light getting through the glass.