Add some light to your next sewing, quilting, or embroidery project with Floriani's Glow in the Dark Polyester Thread. This 40-weight thread offers endless creative possibilities for Christmas, Halloween, and craft projects. Choose from five fun colors, or collect them all in the 5-spool thread collection. Each spool holds approximately 328 yards of thread. Please note that besides the pink thread, the rest of the colors produce a green light.