This is taichimurakami's Blouson. This item is made of a special fabric that has been dyed using a special solution to nullify the waterproof function of nylon, and then given a new waterproof function, making it waterproof, windproof, and breathable. The item uses PrimaLoft, a water-repellent material that combines microfibers of various thicknesses to provide feather-like flexibility and warmth, as well as water repellency, as the padding. The fabric of the front is directly connected to the sleeves without armholes, eliminating the clash of sewing lines as much as possible, thereby reducing stress on movement and making the garment comfortable to wear.