Slippers are a type of shoes with empty heels, only toe caps on the front, mostly flat bottoms, and no laces. The material is often quite soft leather, plastic, cloth, etc. The types of slippers are differentiated according to the wearing occasion and performance purpose. For example, beach slippers will not be made of fabric, but plastic. This is for waterproofing and easy cleaning. The toe type is also specially designed. They are often called flip-flops, which is what we call herringbone. drag. But for indoor slippers in winter, in order to keep warm, fleece may be used instead of plastic, so that people have better enjoyment in the living room. There are also non-slip slippers and slippers for bathing, and shoes without uppers in the second half are generally worn indoors. Usually refers to the three protrusions that only pass through the shoe or the foot, or the direction of the shoe and the foot is parallel to the sole, or the approximate plane where the inner surface of the sole is located and is coplanar with the extension of the calf axis without harming the shoes and feet. Slippers are widely used in people's daily life. Slippers of today's era sometimes include sandals that are worn outside in summer, which are more styled and more refined than slippers worn indoors.