Soltekk Rechargeable Flash LED Reflective Vest for biking or cycling or other outdoor activities, bike light, bicycle light, rear bike light WATERPROOF HIGH QUALITY nylon vest for all weather conditions with 9 red blinking LEDs for ultimate visibility at night USB RECHARGEABLE 600 mAh Lithium battery lasts 20 hours, Charging time: 2 hours VERSATILITY: Vest can be worn directly on back or strapped around backpack ADJUSTABILITY: Quality straps are fully adjustable to fit men, women and children of all sizes LIGHTWEIGHT and COMFORT: weighs just 8 ounces and equipped with back cushion pad for maximum comfort