In Pixar's Cars, Mater is Lightning McQueen's tow-truck friend in Radiator Springs. Mater is a rusty, blue-gray tow truck whose humor and loyalty help McQueen change during his stay in town.
Mater first meets McQueen after the rookie arrives in Radiator Springs. Although Mater enjoys telling exaggerated stories and showing off his backwards-driving skills, he is sincere and welcoming. Their friendship becomes central to the film because Mater treats McQueen as a friend before McQueen has earned the town's respect.
Mater's name is a shortened form of “tomato,” reflecting the character's Southern-flavored speech and informal personality. Larry the Cable Guy provides his voice in the Cars films. A frequent mix-up is calling Mack, McQueen's large transport truck, his closest Radiator Springs friend; Mack is his hauler, while Mater is his local companion.