Muffs are a type of hand warmer designed to keep hands warm in cold weather. They are typically made from soft materials like fur, fleece, or wool and are shaped like a tube. Users can slide their hands inside the muff, which provides insulation and comfort while allowing for easy access to fingers. Muffs have a long history and were popular in the 18th and 19th centuries, often used by women as a fashionable accessory. Today, they are still used for warmth and can be found in various styles, sometimes featuring decorative elements or modern designs to appeal to contemporary fashion trends.