Car journeys with a Dwelf begin with a secure, well-ventilated carrier, which keeps the cat safe and contained whatever the drive brings. As with any cat, allowing a Dwelf to roam loose in a moving vehicle is unsafe for both pet and driver.
Temperature is the central concern for this breed. Because the Dwelf is effectively hairless, it chills easily and overheats quickly, so the cabin should be kept comfortably warm, drafts and direct air conditioning avoided, and the cat never left alone in a parked car in any weather.
Sun exposure deserves special thought. Hairless skin burns readily, and sunlight through a window can be enough to cause harm on a long drive, so shading the carrier or the glass is a sensible precaution. A soft blanket inside the carrier adds both warmth and comfort.