The National Crime Agency said Jakub Jan Konkel, 40, was driving a truck carrying 28 pallets of Skims clothing from the Netherlands when he was stopped by border officials at a port in Essex in September.
The agency said Konkel had stopped on the way to collect 90 kilograms (198 pounds) of cocaine, and that the truck had been specially adapted so that he could hide the drugs, wrapped in 1-kilogram (2.2-pound) packages, in a compartment of the truck's back doors.
The agency said the shipment of clothing was legitimate and neither the exporter nor importer were connected to the smuggled load.
Konkel said he had agreed to transport the drugs for a payment of 4,500 euros ($5,243), according to the agency.
He was sentenced to 13 years in prison for drug smuggling at Chelmsford Crown Court.