I'm selling these because I stocked them for myself but don't have time to use them. These are commercially available cotton threads that have been scoured and then dyed with sulfur dyes. After dyeing, they have been rinsed, color-fixed, and treated with a scented fabric softener. There may be odors from the cotton thread, dyes, and fabric softener. There is a possibility that impurities from the cotton thread remain, and the thread may snag. Approximately 40 grams per skein. The length of the thread before bleaching (unbleached thread) is about 370m for fine thread. Please note that the colors may differ from the screen. These are amateur products made by someone studying dyeing. Initially, the color may bleed, and the dye may transfer to the fabric or your fingers. If you are concerned, please wash separately with a neutral detergent. Please avoid detergents containing bleach, such as laundry detergents. Returns and exchanges are not accepted. #OronaminU Dyed Thread #Sashiko #Sashiko Thread