NiteLite ExtraGlow is a fun, creative glow-in-the-dark polyester thread for quilting, embroidery, and decorative stitching. It is available in 6 colours, and is popular for kids projects, pillowcases, blankets, and PJs. To charge, hold up to direct light for 30-60 seconds. Thread will glow for up to 6 hours, and can be charged up over and over again. Machine washable. Don’t iron or bleach.