Ahrora™ is a fun 100% polyester thread line designed to glow brightly in the dark! Ahrora™ can be used on anything from art quilts to costumes to embroidery, and is a fantastic way to add another dimension to any project. Just switch off the lights to see your stitching light up! Leave it in the sun or under a bright light to recharge for a stronger glow. Use for machine embroidery, decorative stitching, art quilts, cosplay costumes, crafts and more. Recommended machine needles: 80/12 Topstitch, 80/12 Nonstick, 90/14 Quilting, Longarm 16, or handstitch using various embroidery needles. Sold per 200 yard (183m) spool and available in 8 colors, choose below. View WonderFil’s color chart to see a comparison of how each color glows in the dark.