The Samurai Indigo Dyed Sashiko Flannel Work Shirt is a limited edition piece produced in an exclusive 12 oz. Japanese Rain Drop Kasuri Check for a dutiful style-forward heritage collector’s item with patina potential. A sophisticated raindrop pattern over a subtle check is achieved using Kasuri Kasezome indigo pot and rope dyed techniques from the Edo period in Japan, typically used for kimono and martial arts garments.