Infant Convertible Car Seat

convertible car
A convertible is a type of automobile in which the roof can retract and fold away, converting it from an enclosed to an open-air vehicle. Many different automobile body styles are manufactured and marketed in convertible form.

infant
A very young child or baby
baby: a very young child (birth to 1 year) who has not yet begun to walk or talk; "the baby began to cry again"; "she held the baby in her arms"; "it sounds simple, but when you have your own baby it is all so different"
A person who has not attained legal majority
(infancy) the early stage of growth or development
An infant or baby is the very young offspring of humans. A newborn is an infant who is within hours, days, or up to a few weeks from birth.
Denoting something in an early stage of its development

seat
A thing made or used for sitting on, such as a chair or stool
show to a seat; assign a seat for; "The host seated me next to Mrs. Smith"
be able to seat; "The theater seats 2,000"
The roughly horizontal part of a chair, on which one's weight rests directly
a space reserved for sitting (as in a theater or on a train or airplane); "he booked their seats in advance"; "he sat in someone else's place"
A sitting place for a passenger in a vehicle or for a member of an audience