I believe they only come in comfort seats. I have them and they work fine. They can be a bit noisy you can hear the fans in the back of the seat when in use. However, definitely worth the trade off for comfort. It does not blow Aircon air just simply air into the back and seat.

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2013 BMW X6M-current
2013 Audi S4-current
2007 BMW X5 4.8i (E70)-sold