Ask Lemmygrad

Uniqlo has donated to Palestinian refugees.

https://www.unrwa.org/our-partners/private-partners/partnerships/uniqlo

Assuming you're in the west, when all else fails (or even when everything is fine) you can always buy Chinese... Or whatever other global south brands are available (it's almost always Chinese though).

It's certainly what I do. You can thrift, and you can get things on (Temu/AliExpress/Shein/etc). You can cut out the nasty imperialist middlemen who offer little to nothing of value and charge a premium, and I think you'd be surprised at the variety available, the prices, and the quality if you look at reviews.

Paliroots

Not a brand, though this answer will not help if you or someone else needs new clothes, but surviving with the clothes you already have and limiting your funds to support potentially genocide-supportive brands as well as limiting money circulating in one's imperialist country is an act of protest and is something to keep in mind if the option is available.

This option works for me because I kept so many clothes my family and friends gave me over many years, continue to wear the same few set of clothes until they are in shreds, and continue to use them for dirty work clothes and/or make plans to turn my old graphic tees into a blanket or curtain. I probably should get rid of clothes, but I kept them because they helped me save money. I am a bit of a hoarder, which is influenced by my poor upbringing.

Also buying second-hand stops money going directly to the businesses that made said products, and I always try to find anything I want or need to buy used, whether on eBay, at a thrift store, at a garage sale, from a friend, etc. first before resorting to buying it new.

I typically buy clothes at my local thrift store, especially if my work clothes rip or a zipper breaks. My mother has helped me sow some of my work clothes when I was really busy and really didn't want to purchase more clothes.

Hirbawi Kufiya

Well Patagonia is one of the brands I don’t feel bad supporting due to their commitment to repair, reuse, and mission to behave as ethically as possible within a capitalist corporate structure.

I looked up their links to Israel and find a bunch of insane babble from Christian and Israeli sources about hundreds of thousands of dollars in “pro-terrorist” and “pro-Hamas” donations.

So now I am even happier to purchase Patagonia lmfao

WearThePeace

Depending on the country that you are currently located, the answer could vary. In any Arab countries or in the global south, it is easier to find choices but if you are located in the imperial core choices are limited or nonexistent.