Cars with reflective sunshades have the lowest temperature inside the car.
The interior of a car that is parked outdoors on a hot sunny day can reach temperatures of up to 90 °C. This drastic increase temperature is caused by a combination of hot temperatures outside the car and lack of proper ventilation for the hot air to escape out of the car. Utraviolet radiation from the sun also enters through the windscreen and heats up the air in the car. The front windscreen also sometimes acts like a magnifying glass, intensifying the sun rays, and make the car interior hotter on sunny days.
These extreme conditions will not only cause a lot of discomfort to the driver and his passengers, they can also damage the interior of the car. The two methods that are normally used to reduce the build up of temperature in the car are tinting the car windows or using sunshades. Tinting the window involves permanently installing a film on the window of the car. In some countries, this is not permitted by law.
Sunshades on the other hand, are removable. They are very effective in blocking the sun’s rays from entering through the car’s windshield. Sunshades are able to prevent and block about 99% of the sun’s ultraviolet rays from entering inside the car.
Ensure that cars are driven by persons with valid driving licenses.