This is a set of two "PCM HOT RING" neck warmers! Includes sizes S and L, so they're perfect for parents and children! Ideal for office work, working from home, solo camping, and more. Scarves are a popular item for staying warm in the cold season. Neck warmers are constantly evolving, with new products like those that heat up with a power source. However, power sources require the hassle of charging. The "PCM HOT RING" gently warms your neck to approximately 49°C. Made with temperature-sensitive PCM material, it maintains warmth for a long time. No power or batteries are needed, making it reusable and economical. The soft fur cover is removable and hand-washable. Consider getting one for working from home or other tasks at home. ■ Materials ・ Cover: Polyester ・ Main Material: Thermoplastic Polyurethane ・ Core Material: Special Phase Change Material ■ Melting Point ・ Approximately 49 degrees Celsius ■ Reference Price ・ ¥2,350