This inner vest uses thin yet warm Thinsulate insulation from the American company 3M. It can be worn as an outer layer in the fall, or as an inner layer under jackets, parkas, or coats due to its thin design, allowing for a sleek, layered look without bulk. The indigo dye also adds to its appeal with its faded appearance. The color will fade in areas that rub, creating a unique texture over time. 【Materials】 Outer: 70% Cotton, 30% Nylon Lining: 100% Polyester Insulation: 100% Polyester Retail Price: ¥24,000