How can I assign 1 post to multiple subcategories?

Hello,

How can I assign a post to multiple subcategories.
For example category is “fabric manufacturers”.
Subcategories: cotton, wool.

If certain manufacturer is manufacturing both wool and cotton, i want that post to be assigned to both cotton and wool subcategories.

How do I do this?

Or such a basic requirement is only possible with plugins or special development?

Thanks