Shein

Shein is the worst fast fashion offender due to its unprecedented scale, adding 1,000 to 10,000 new styles daily, with documented labor violations in its supply chain. The Chinese ultra-fast fashion giant’s environmental footprint dwarfs Temu, emitting an estimated 6.3 million tons of CO₂ annually. Despite claims of sustainability efforts, Shein’s reliance on synthetic fabrics, which shed microplastics, exacerbates pollution. Its decentralized manufacturing avoids accountability, making it a benchmark for harmful practices in the industry.