100% New and High Quality Glow in the dark embroidery thread will glow in the dark.This thread is a new kind of textile material with Eco-Friendly. For Machine Embroidery/Sewing Features: Color: 1000 Yards: Purple, Pink, White 3000 Yards: Yellow, Middle-Yellow,Blue Material: Polyester fiber + noctilucent factor Thickness: 150D/2 It could give out light continuously at night over 12 hours after absorbing the visible light for 10-15 minutes.Therefore,it is widely used in developing new textile products and exquisite products. To get a good glow effect, use thread liberally. The more thread you put in an area, the more glow you will get. If only partial Embroidery Thread absorb natural or artificial light is not enough to get a good effect Packaged: 1 x Luminous Sewing Thread Note: Please be reminded that the color of the picture and the actual item could be slightly different due to the different monitors and lighting effects.