The cord was developed for tie tie down and is firmer to provide tension when tied, compared to regular thin cord.
Because the material is polyester, it will not fade, and if you release the end of the thread and put it on steam, it will become a tuft, and it will melt when hit with a lighter or other fire.
This cord is perfect for making accessories and cell phone straps, lacing crafts, etc.
Item Number:
Size/Quantity: Extra fine 16.4 ft (5 m)
Color/Pattern: Col.736 Black
Thickness: Approx. 0.03 inches (0.8 mm).
(From Amazon.co.jp)