au naturel
US /ˌoʊ nəˈtʃʊrəl/
UK /ˌoʊ nəˈtʃʊrəl/

1.
in a natural state; without artificial additions or adornment
:
•
She prefers to wear her hair au naturel.
•
The chef prepared the vegetables au naturel, with just a touch of salt.
in a natural state; without artificial additions or adornment