I do a decent bit of shopping on wconcept , which curates Korean designed clothing and accessories. The US domain site doesn’t have a ton of reviews so if you want to read through more reviews, I recommend digging around on the Korean domain wconcept.co.kr for the same item and translating the reviews. More on reddit.com

Are you for a brand with a website or a store that sells multiple brands? There are brands who only use natural fibers such as Ozma of California and Doen. Some mid-tier mall stores sell some quality clothes. You just need to check the tags. The Gap sells tops that are made of 100% cotton. Everlane uses mostly natural fibers and supposedly follows ethical manufacturing standards. They’re mostly reasonably priced. Construction is decent. More on reddit.com

i know it’s in the mall lol but i get almost all of my clothes from aerie. and occasionally urban outfitters (i would more if it wasn’t so expensive!!). i also really like princess polly for nice stuff. it’s expensive but i’ve gotten two dresses there for going out on special occasions and they were sooo pretty and i got so many compliments. other than that i’ve been getting a lot of sweatshirts and t shirts from etsy lately, i never thought of it to shop for clothes but i love getting random celeb merch and cute embroidered stuff. i wish i could give more unique places but i dont really know any lol More on reddit.com

Check out Garmentory.com - it curates a ton of small brands/boutiques into one site. When I first started shopping small brands, I would look at Garmentory, then for any item I liked, I would follow the brand and/or boutique on Instagram, which would then lead me to other great brands. More on reddit.com