掛け布団 (かけぶとん) is a type of bedding commonly used in Japan, similar to a comforter or duvet. It is typically filled with materials like cotton, polyester, or down feathers, providing warmth and comfort during sleep. The掛け布団 is usually placed on top of a mattress or futon and is often covered with a decorative duvet cover. In Japanese culture, the掛け布団 is an essential part of a traditional sleeping arrangement, often used alongside a 布団 (ふとん), which consists of a mattress and a pillow. This bedding style promotes a cozy and restful sleep environment, especially during colder months.