A large percentage of the cars out there are aerodynamic, slippery vehicles that cut through the wind, resulting in increased gas mileage. Hurrah for that...but you still have to carry your gear.
Whispbar racks are whisper quiet, and mount on most cars without a factory rack. They're designed to sit on the roof of the car with a clip that extends down into the door frame to hold the tower securely. A thick pad sits between the Whispbar tower and the surface of your roof, to avoid damage and scratches and other automotive calamities.