Glow Filament Yarn can emit light in the dark for 4 to 5 hours after absorbing sunlight or artificial light for about 30 minutes. It glows steadily in green with high brightness and long-lasting visibility. The yarn is non-toxic, safe for human contact, and environmentally friendly. The luminous material is permanently and evenly embedded within the fiber, ensuring durability through repeated washing. It is widely used in children's wear, outdoor sportswear, and safety accessories.