Shein has many vocal critics such as Tufts’ Pucker, who say the company’s low prices and hyper-fast new product cycle encourage unsustainable consumption and resource use. “It’s not just that it’s more polyester, chemicals and microfibers, it’s the associated negative externalities that are unfunded and impact all of humanity.”
https://www.greenbiz.com/article/inside-sheins-plan-recycle-deadstock-material-new-clothing