bandeau
US /bænˈdoʊ/
UK /bænˈdoʊ/

1.
a narrow strip of cloth or other material worn as a headband or as a covering for the breasts.
:
•
She wore a silk bandeau to keep her hair out of her face.
•
The swimsuit featured a strapless bandeau top.
a narrow strip of cloth or other material worn as a headband or as a covering for the breasts.