This is a Type 1 jacket made from one-wash denim. The back design varies depending on the size.   *Please note that the back design differs depending on the size. Sizes 5 and 6 have a T-shaped split back design, while size 7 has a P-shaped split back design.   *This product uses IDG dyes. When worn, the color may transfer to other clothing.   100% Cotton   Made In Japan Product Code: SLJ010, SLJ010A