
No.40 machine embroidery thread. Special effect, glow in the dark thread that absorbs light through the day, and glows when the lights go out. Suitable for all types of embroidery. 100% Polyester. Washable up to 50 times at 30 degrees without diminishing the glow. 100m spools. Use with machine embroidery needles: size 75/11 or 90/14.