It glows! This may look like ordinary white yarn, but don't be fooled! When the lights go down, DIY Glow yarn turns up! This 100% polyester yarn in a classic worsted weight/CYC 4 is perfect for fiber artists of all skills and ages. Make glow-in-the-dark hats, scarves, and cowls for nighttime adventures, or add fun trims to costumes.3 Skein PackWeight: Medium (4)Contents: 100% polyesterSkein Weight: 1.75 oz. / 50 gYardage: 71 yd. / 65 mKnitting Gauge:18 sts - 24 rows = 4" (10 cm)Crochet Gauge:13 sc - 16 rows = 4" (10 cm)Suggested Knitting Needle:5 mm, US - 8Suggested Crochet Hook:5.5 mm, US - I/9