USED PURE BLUE JAPAN AI-013 17.5OZ. NATURAL INDIGO SELVEDGE JEANS (SLIM TAPERED) PURCHASED IN 2016 AT BLUE IN GREEN SOHO. “Pure Blue Japan uses natural indigo harvested in the Tokushima prefecture of Japan to hand dye the 17.5 oz slim tapered AI-013 jeans. Tokushima indigo is protected under Japanese law as a national treasure and only a handful of craftsmen and women are certified to work with it. Dyeing by hand is a slow and laborious process but the results are exquisite as the indigo penetrates the core of the cotton yarns as they are repeatedly dipped into the vats of indigo. The combination of this unique technique and PBJ's textured denim results in a jean that is imbued with indigo like no other. It's a slow release fade and all the more beautiful for it.”