Its built-in luminous core absorbs light and emits a soft, cool glow in dark environments, using safe, non-toxic materials for long-lasting, fade-resistant performance—bringing unique visual and tactile pleasure day and night. 【Vibrant color & Luminous Core Design】This adult fidget toy features a bright, energetic color that stands out and adds a lively touch to your daily carry. 【Three-Layer Metal Structure & Smooth Tactile Feel】Crafted with premium metal, the three-layer slider is carefully polished with smooth edges to avoid scratches, offering a solid, comfortable grip.