This specific model is a recreation of the high–end work shirts from the 1930s, specifically those designed for grueling labor in high–heat environments. Because it is rope–dyed with indigo, it will develop high–contrast fades at the seams. In the 1930s, triple–needle stitching was the gold standard for “heavy–duty” gear. The main seams (shoulders, side seams, and armholes) are reinforced with three parallel rows of stitching. One of the most sought–after aesthetic traits is “puckering” (or ataru in Japanese). As the shirt is washed, the heavy thread causes the fabric to bunch slightly, creating beautiful character along the seams.