I'm selling these because I stocked them for my own use, but I don't have time to use them. These are commercially available cotton threads (from a bird shop) that have been scoured and then dyed with chemical indigo. After dyeing, they have been rinsed, color-fixed, and treated with a scented fabric softener. There is a scent of cotton thread, dye, and fabric softener. There is a possibility that impurities from the cotton thread may 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. The color may bleed at first, so there is a possibility that the dye will transfer to the fabric or your fingers. If you are concerned, please wash separately with a neutral detergent. Please refrain from using detergents containing bleach, such as laundry detergents. Returns and exchanges are not accepted. #OronaminU Dyed Thread #Sashiko #Sashiko Thread