Color: Black Size 4: Width 64cm, Length 74cm Brand new, unused An insulation jacket that pursues a balance of moderate heat retention and breathability. It is active insulation for various outdoor scenes such as mountain climbing and skiing. The outer and lining fabrics use Pertex Quantum Air, which is lightweight and durable, and combines wind resistance and breathability at a high level. The main insulation is PrimaLoft Gold Insulation, which is resistant to loft loss even when wet and maintains heat retention. The areas that tend to get sweaty do not have insulation, but are finished with Octa, a material with moderate heat retention, breathability, and stretchability. Octa is composed of a slightly brushed surface and a flat back surface, with a smooth flat surface from the underarm to the under-sleeve, and a slightly brushed surface on the back of the collar for increased heat retention. The front has a double slider specification that makes it easy to adjust the internal environment of the garment depending on how it is opened. The three-dimensional design of the sleeves, which is adapted to the human body and movement, enhances mobility. The forward-facing sleeves make it easy to move forward and backward, and the pattern design allows for a high degree of freedom of movement. It comes with a stuff sack for easy compact carrying.