This is a packable down vest that can be used as a pillow. I bought it at a Tumi boutique in New York. The size is S in US sizing, which is about ML in Japan. Color: Black Size: S, M, L It can be stored in a pouch and used as a "neck pillow (travel pillow)". When unfolded, it becomes a lightweight and warm down vest. Portability: When folded, it comes with a crossbody strap that can be worn over the shoulder, allowing you to carry it like a bag when not wearing the vest. Size: M