Clothing-makers called on the Trump administration Monday to forgo placing 25% tariffs on $300 billion worth of goods imported from China, arguing the action wouldn’t protect the domestic industry since it widely uses supply chains that include China.

The comments came as the administration began the first day of public hearings at the U.S. Trade Representative’s Office in Washington, D.C., on President Trump’s tariff plans, which would effectively put all goods imported from China under a 25% rate.