The inside top door panels
The inside top door panels are plastic and do not get hot in the sun. The "cloth" seats are a woven nylon fabric that breathes and does not get hot. (Its design resembles an Aeron chair.) Leather will always be hotter than cloth in the Summer; colder that cloth in the Winter, and with the design of the ND's chairs, even tan leather will be hotter in the sun than the black cloth.