One way you can help keep your 2007-2010 Caliber or Caliber SRT-4 cooler during the hot summer months is with Weathertech Sun Visors.
These attach within minutes with no tools and allow you to leave your windows cracked slightly open when parked. This keeps your car much cooler than if the windows were sealed shut. These also allow you to have the windows open during driving for fresh air.
For more info click on any of the images.
Fits 07, 08. 09. 10 Dodge Caliber, Dodge Caliber SRT-4 2007, 2008, 2009, 2010