Full leather in the A3?

Hello, I’ve been reading with you for some time now, would like to start this summer with a new A3 2.0 TDI. However, I’m still a little unscathed with the equipment: Would I really like to treat myself to full leather, but I’m not really sure if this is a good idea in the summer, if the seats are totally heated up… In winter it’s not really a problem… What are your experiences about this? And, if leather, what do you think, what color? n it should be lava grey lacquered, tend to anthracite/grey leather… Greeting Christian