The C5 climate control system is excellent; maybe (for some) too excellent. The air conditioning vents can be redirected -- but cannot be turned completely off. If your passenger finds the interior too cold, the only solution (until now) would be to carry a blanket. But, no more: "Comfort Covers" snap into the air vents, blocking the airflow completely. They install in two seconds with no messy tape or screws or tools required. They even look like an OEM option! Available in passenger side set, driver's side set or as a complete car set. Specify black or shale when ordering.