TAION's classic inner down islight, warm and easy to wear, not only under jackets and coats, but also on T-shirts, shirts and hoodies.-The YKK Planter button is used in the front.-There are zipper pockets on both sides.-Comes with a storage bag. It can be stored compactly and is convenient to carry. Great for going out or traveling.Feathers are light and use down with 650 fill power or more with good repulsion.The outer material is made of nylon with a high density of 400T or more and super water repellent high density processing, so it is not only water repellent but also resistant to dirt.We Recommend Sizing Up.We recommend buying one size up as these jackets run smaller due to sizing translation from the Asian market. We have been told to use the Asian size. Taion V Button Down Vest - Green