a cutout in a car's (or truck's) roof that can be opened to provide fresh air and sun to the people inside
a fairly significant part of any new vehicle program (imagine the consequences if it didn't seal properly), yet they often enter development long before the OEM is willing to release a prototype vehicle to Webasto
A window-type opening in the roof of the vehicle that can tilt or slide open.
A sunroof is an opening in an automobile roof. Sunroofs may be either fixed or operable.