This is the AXESQUIN Elements Active Insulation Jacket. It's light and fluffy. It feels comfortable to wear. The color is Sumiiro (charcoal gray), and the size is 1. It's about the size of a women's M. The actual size measurements are in the last image, so please refer to them. Brand new, unused. The following is a quote from the manufacturer's description: It looks like a simple round-neck cardigan, but it's a light and fluffy active insulation that combines a highly breathable shell with moderate insulation lining. Teijin Octa, a revolutionary polyester material, is about half the weight of polyester fibers of the same diameter. It not only quickly absorbs and disperses sweat with the hollow part in the center of the fiber and the eight protrusions arranged radially on the surface, but also achieves heat insulation and heat retention by including a lot of dead air in the space created by its unique shape. It is effective as active insulation that provides moderate heat retention and releases sweat on mountain trails in cold seasons, and as insulation to prevent chilling from sweat during stagnation when walking on old roads in warm seasons. If you slip it into the gap of your backpack, you can use it all year round. In addition, the neck is finished with a neat round neck, considering the possibility of layering. Synthetic fiber jacket AXESQUIN (Axesquin) ELEMENTS Octa Lining Cardigan AXESQUIN (Axesquin)