Product parametersr: Glow in the dark yarn: This set contains 2 rolls of glow in the dark yarnYarn for crocheting, each roll is 50 meters long. Glows in the dark: The glowing effect of this yarn is activated by UV light.If you have a UV light source, you can easily restore the brightness of your yarn.If not, just expose it to sunlight to charge. Durable Polyester Material: This yarn is made of high quality polyester, which is not onlysoft, but also unbreakable.It is ideal for both beginners and experienced crafters. DIY ART MAKING: Unleash your creativity with this bright yarn.Use it to create bright scarves and hoods or add playful embellishments to your outfits.It's perfect for adding a touch of magic to your nighttime adventures. PERFECT GIFT: This yarn set uses different colored yarns to create differentEmitting shades of light, making it a great gift for friends and loved ones on Christmas, Valentine's Day, birthdays, Easter, parties and other occasions.Unleash your creativity with this unique and thoughtful gift.