Maybe donate it to poor countries?
When I used to work for the biggest ecommerce in europe, we had various stages for clothes. The last stage was selling the clothes by kilo to companies.
I don't think these companies want the poor people to wear their brand.
They'll find another way to destroy them.
2018 article reports that Burberry destroyed £28 millions worth of clothes to keep their brand "exclusive": https://www.bbc.com/news/business-44885983
Most clothes are manufactured in countries with cheaper labor costs to cut costs - the reality is clothes are cheap to make in terms of raw materials- and dumping unwanted clothes will just destory the local economy
Poor countries don't need clothes. They have clothes. It's just more (mostly plastic pollution) that fills their landfills and rivers.
That has already been happening for decades - and it isn't the "net benefit" most think it is - here is just one example - but there are dozens of similar articles that can be found:
https://www.udet.org/post/the-hidden-cost-of-generosity-how-...