I purchased this on Amazon two years ago for my middle school daughter who suffers from headaches. It stretches the neck well, but she couldn't keep using it. Original price was about 3300 yen. There are no noticeable stains or anything. For those who need it. The following is from Amazon: Manufacturer: Fanlecy Features: Portable, Durable Color: a Black Material: Foam Shape: Semicircular Target age: Adults 【Simple and Effective Shoulder and Back Stretching Solution】Do you feel discomfort in your shoulders and neck due to poor posture from long hours of smartphone or computer work? This multi-functional neck & back relax pillow is designed for modern people, supporting posture and providing comfortable neck and shoulder support. You can easily stretch your neck and back gently at home and feel relaxed in just 10 minutes a day. 【Premium Safe Material】This neck stretch pillow is made of high-density integral skin foam, which is safe, durable, and not easily deformed. The micro-elastic material comfortably supports the cervical spine and stretches along the curves of the neck and back. 【Ergonomically Designed Neck Pillow】The neck & upper back pillow is designed to follow the curve of the human spine, supporting the neck and upper back while widening the shoulders, promoting relaxation. The C-curve design allows for vertical, horizontal, and curved stretching, using the weight of the head to support the entire cervical spine and back. 18 protrusions acupressure the muscles around the neck, spine, and shoulder blades, stretching and relaxing the shoulders, neck, and back like a chiropractor. - Color: Black - Material: Plastic - Design: Ergonomic with massage points - Shape: Curved for neck support - Function: Neck massage tool Thank you for looking.