Item Type: Luminous chunky yarn Material: Polyester Length: Approx. 50m / 164ft Package List 1 x Luminous Chunky Yarn 1Glow: Luminous chunky yarn absorbs sunlight UV rays during the day and brightens at night. Because of its soft, sweat wicking and breathable texture, you can use yarn balls to crochet baby clothes or other accessories. 2Easy To Use: Our glow yarn is easy to use and will not be too harsh like other glow in the dark yarns. The color is more beautiful when it is glowing in the dark. And light makes clothes even cooler 3Material: Anyone who loves crocheting, knitting and crafting will love this glowing yarn because it is easy to use and beginner friendly, soft and not easy to break. 4Luminous Function: This luminous knitted yarn light automatically at night or in a dark environment (it does not emit light during the day). The color is bright and the luminous effect is good, and the yarn can remain luminous for more than 8 hours. 5Long Use Time: The DIY luminous yarn is made of reliable material, which is not easy to break when washed, and is reliable and durable. The yarn is recommended to be stored in a cool, dry place away from light, so that the luminous effect can be maintained for a long time.