Year-round fun for all ages, this innovative thread will delight kids and adults alike! At 40 wt., this glow-in-the-dark thread is compatible with digitized embroidery, and for best results, fill in select areas of your designs for optimum glow. Fine outlines will be more subtle, and glow recharges quickly when exposed to light. Machine washable/dryable for easy care! 100% Polyester, 100 yds, glow-in-the-dark machine embroidery thread by Coats & Clark.