Trump’s so-called reciprocal tariffs are scheduled to go into effect on August 1 after a 90-day delay—just as American families begin back-to-school shopping—and could hike up the cost of consumer goods imported from other countries.

Trump has sent letters to leaders of dozens of countries outlining the tariff levels set to begin on Aug. 1. In recent months, Trump has rolled back some of his steepest tariffs, meaning delays could be possible in the case of the Aug. 1 deadline. The Trump administration appears to have stood largely behind the deadline in recent days, however.