bucket seat
US /ˈbʌk.ɪt ˌsiːt/
UK /ˈbʌk.ɪt ˌsiːt/

1.
a single seat with a contoured shape, often found in sports cars, designed to hold a person securely in place
:
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The sports car had comfortable bucket seats.
•
He adjusted the bucket seat to his liking before driving off.