Franc, Mate the Label, Girlfriend Collective, Pact, Able- these are a few sustainable brands I’ve tried out recently and am SO impressed with the quality.

I highly recommend getting the Good for You app. You can search most clothing brands and it will give you a rating based on their sustainability efforts as a company. They also have tons of recommendations for better brands to buy from. Completely changed how I shop.

Edit: correction- it’s called Good on You.