Shein's lawyer, during a recent inquiry, repeatedly dodged questions regarding the origin of its cotton.
This refusal to clarify whether the company uses Chinese cotton sparked outrage among MPs, who deemed the testimony highly unsatisfactory.
The fast-fashion giant, rapidly expanding globally, faces mounting scrutiny over its supply chains and labor practices.
Concerns about forced labor in Xinjiang, China, further intensify the pressure on Shein to increase transparency about its sourcing.