LightLead Luminous Thread is based on polyester or nylon.
Luminous Thread is designed and tested for today's high-speed embroidery machines with any bobbin thread (poly, cotton, etc.) and suited to all domestic home embroidery machines. Luminous thread is machine washable, and can withstand up to 420° F (for patch embroidery or emblems).
Charge it with natural or artificial light for a few minutes and watch it glow for up to 6 hours, time after time. Great for hats, shoes, t-shirts, tents, belts, curtains, bedspreads, cushions, table cloths, pillowcases and any other design to show off at night.