The leather surfaces in cabriolets heat up when the sun shines on them. The heat protection counteracts this effect using a special pigmentation.
The infrared rays from the sunlight are reflected. The heat protection is able to reduce the surface temperature by up to 20 °C. Heat protection is available, for instance, in the Audi R8 Spyder 5.2 FSI quattro in conjunction with the Alcantara/leather combination and Fine Nappa leather upholsteries.