TRU-SPEC Tru-Spec ECWCS Gen2 H2O PROOF This is a high-performance military jacket, a genuine US military surplus item. It doesn't have down filling, so I think it's suitable for the climate of a Japanese winter. It's a highly functional military jacket, with features like underarm ventilation, double-layered elbow patches, and a double-front design. H20 is not very well known, and it doesn't seem to be widely available. It's very difficult to find a Medium Regular size. As a silhouette, it has a trendy shape that's in style now, and I think it's also fashionable. It's suitable for everyday wear, so I recommend it for those who commute by train in the winter. Black military-style jacket, size M, with practical pockets. - Color: Black - Size: M (Medium) Thank you for viewing.