This is a reversible down vest from MUJI. The model number is 330565-378. It's a black color, S-M size, and features a collarless design made of 100% nylon, a lightweight material. It's reversible, allowing you to use both sides: one side has a glossy nylon finish, and the other has a matte fabric, so you can switch it up depending on the occasion. It's also pocketable, allowing for compact storage. The actual size is approximately 53cm wide and 70cm long, with a relaxed silhouette that makes it easy to layer and keeps you warm. Please purchase only if you understand that this is a used item. It will be folded and shipped compactly. Instant purchase is welcome.