What is a "duffle coat"?

A duffle coat is a type of heavy winter coat that is made of a thick woolen material, typically with a coarse texture, and is characterized by its toggles and hood. The coat originated in Belgium in the early 20th century and was later adopted by the British Royal Navy as a part of their standard issue kit. Duffle coats typically have a boxy and oversized silhouette, with a roomy hood, large patch pockets, and wooden toggle closures. They are a practical and warm option for cold weather and are often associated with a preppy or nautical style. While they were originally designed for use by sailors, they have since become a popular fashion item and are worn by both men and women.