More likely muskrat (Ondatra zibethicus) fur. Muskrats are found over most of Canada and the United States and a small part of northern Mexico. They were introduced to Europe in the beginning of the 20th century and have become an invasive species in northwestern Europe. They mostly inhabit wetlands, areas in or near saline and freshwater wetlands, rivers, lakes, or ponds. Muskrat fur is warm, becoming prime at the beginning of December in northern North America. In the early 20th century, the trapping of the animal for its fur became an important industry there. Muskrats were introduced at that time to Europe as a fur resource, and spread throughout northern Europe and Asia. In European countries the muskrat is considered an invasive pest, as its burrowing damages the dikes and levees on which low-lying countries depend for protection from flooding. In those countries, it is trapped, poisoned, and hunted to attempt to keep the population down.
(from Wikipedia: https://en.wikipedia.org/wiki/Muskrat )