be made of
US /biːt əˈraʊnd ðə bʊʃ/
UK /biːt əˈraʊnd ðə bʊʃ/

1.
to consist or be composed of something
:
•
The table is made of wood.
•
What is this strange material made of?
2.
to have a particular quality or characteristic
:
•
He's not made of stone; he has feelings too.
•
She's made of strong stuff; she'll get through this.