This thread is a new kind of textile material with eco-friendly. It could give out light continously at night over 12 hours after absorbing the visible light for 10-15 minutes. Therefore, it is widely used in developing new textile 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. Features - Color: Light Yellow. - Material: Polyester. - Size: 13 * 9 * 8cm(L * W * H). - Length: 3000 Yards. - Thickness: 150D/2. - Super bright and permanent glowing effect, meet the latest environmental standards. - For machine embroidery/ sewing, adding highlights to your project. - The sewing thread will glow continously in the dark for 4 to 6 hours after absorbing enough light for 2 to 3 hours. - It is a new kind of textile material with eco-friendly which is widely used in developing new textile products and exquisite products. - It features smooth, soft, which can be used for baby clothes, bags, knitted hat, shoelaces, phone straps, cross-stitch, sewing or etc. - Pls be noted that due to lighting effects and monitor's brightness/contrast settings, the color tone of the website's photo and the actual item could be slightly different.