1. Expandable Headband Using elastic and stretchy fabrics, no-slip materials for a comfortable, snug fit. Fashionable and unisex design headbands . 2. High Visibility Bright LED lights on the headband ensure you be seen by cars, motorcycles at any weather condition like dark, rain, fog, to keep your safety while running, jogging, dog walking. 3. Comfortable & High-quality Materials Made of breathable knitted Fabrics, Our LED sport headband features skin-friendly, comfortable wearing. lightweight and balanced NO-BOUNCE distribution achieves snugly fits. Suitable for men, women, and children in activities. 4. Long Lasting & USB Rechargeable Headband High quality Lithium ion rechargeable battery - conveniently charge anywhere 5. Fully Washable The Headband features PVC elastic seal that make the LED module easy to remove and reinstall so you can wash the headband. Recommend hand-washable after removing the LED module.