There’s a rectangle with two circles on the bottom- one on the left and one on the right to symbolize wheels. On the top of the rectangle there is a slanted line where the window would be on a car and a small triangle symbolizing the car seats.
This Convertible icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.