S is for Seam Shibori
Some form of a stitched resist method of dyeing. But in this case, discovered by accident, simply the result of opening up a seam from an old garment or other functional cloth item, and revealing the fade of wear in contrast to the area of cloth that stayed protected from light and use. Sort of “dyed with age”. Like a fossil embedded in the fabric
I first considered naming it way back here.