Critics say Shein and Temu are able to offer low prices because they evade import duties under the de minimis exemption — a loophole that could soon be closed.

Measures tightening customs waivers on low-value shipments of foreign goods going directly to U.S. consumers may undercut allegedly unfair cheaper pricing by Chinese e-commerce companies Shein and Temu.

The Biden administration said on Friday it was moving to curb low-value shipments entering the U.S. duty-free under the $800 "de minimis" threshold that has been exploited by Chinese e-commerce firms such as Shein and PDD Holdings' Temu.