Sashiko is a form of decorative reinforcement stitching (or functional embroidery) from Japan. Traditionally used to reinforce points of wear, or to repair worn places or tears with patches, this running stitch technique is often used for purely decorative purposes in quilting and embroidery. The white cotton thread on the traditional indigo blue cloth gives sashiko its distinctive appearance. To start my own, i took my 9 years old gap jeans- which got torn at knees and crotch. took another denim and hand stitched with thick ecru thread in a regular pattern- though multiple times. Pretty impressed with the result.