Marshall Field's created 'the wonder rug of America,' once touted at the Chicago World's Fair. But after decades, the miracle carpet's era is ending.

From 1928 until 2019 Karastan looms in Eden, N.C., made a worsted wool rug that so convincingly replicated the design and durability of imported, handmade rugs from the Middle East and Asia that it was called "the wonder rug of America."