Sashiko jumpsuit jacket, Indigo : Style : Jumpsuit. This is a simple modegrave;le that goes with any style. Fabric: 11oz indigo sashiko Sashiko fabric was originally used for firemen's outfits in the Edo period. Today, it is used for judo and kendo uniforms. The fabric is lighter and more supple than in the past, making it suitable for everyday, relaxed wear. JBJ's indigo sashiko fabric is rope-dyed like denim, allowing it to de-color. Button closure. JBJ original donut button. 100% cotton. Made in Japan. Colour: blue