A pillow is a soft household item that can be used to support the head, neck, back, or other body parts. Its main design purpose is to provide comfortable support and reduce stress to help users get better rest and relaxation. It is usually made of soft and comfortable materials, such as memory cotton, down, cotton, polyester fiber, etc. These materials have good elasticity and support, can adapt to human body curves, and can maintain shape to provide stable support. It can help improve sleep quality, reduce shoulder and neck pressure, alleviate back fatigue, and promote relaxation. They are also widely used in various occasions such as travel, offices, vehicles, and homes.