Chinese online retail giants Shein and Temu have warned US customers that goods will get pricier from next week, after President Donald Trump imposed hefty tariffs on goods from China.
In almost identical statements, the rival companies said they have seen operating expenses rise "due to recent changes in global trade rules and tariffs", adding they will make "price adjustments" from 25 April.
The shopping sites have gained tens of millions of customers in the US, attracted by their ultra-low prices.
Their popularity has put pressure on Amazon, prompting it to launch a new platform called Haul last November, featuring items for under $20 (£15.10).