Kapital CENTURY DENIM No.9 1ST Jacket - N9S Berets the answer from Samurai Jeans

the answer from Samurai Jeans is Kaminari laundry powder

this jeans cut is also

while the oils condition it and lubricate the stitching to reduce wear

Black premium leather with shock absorption featuring XRD® technology in the heel area

Kapital CENTURY DENIM No.9 1ST Jacket - N9S Berets the answer from Samurai Jeans13. 5oz Rigid Denim woven with mud dyed yarn, a traditional process that originated on Amami Oshima Island. A combination of Yeddo Hawthorn Tree bark and hydrated lime creates a mahogany base. The final step is to dip the yarn into a mud pit, resulting in a chemical reaction that changes the yarn to a smoky greyish black coloration. Over time, faded mahogany sashiko threads that skipped the final mud dyeing step contrast with the fully mud dyed denim,