This is a rare, Sumizome (ink-dyed) Backlash rider's jacket. I'm not sure exactly how it's dyed, but as you wear it, the black base underneath comes out nicely. "BACKLASH" uses a dyeing method that uses Sumi (carbon) as a dye, and refers to products made using this method. It's characterized by its unique unevenness and texture, especially used on linen fabrics, aiming to create a one-of-a-kind look. That's what it is! I'm still breaking it in, but I have too many, so I'm selling it to organize. It's not a stain, but rather a rider's jacket that will develop character over time. Is it a single or double rider's jacket? The width can be adjusted. It's a rare type, so for those who like it. Size: 2 Shoulder width: 41-2 cm Width: 46 cm Length: 60-3 cm Sleeve length: 60 cm