[Green Light Double Sided LED Safety Vest]: Unlike ordinary white light, human eyes are more sensitive to green light. The front and rear green LED light strips provide night visibility of up to 300 meters and can be quickly noticed by the driver when driving at night, reducing the risk of an accident. usb charging: The child safety vest has a built-in charging battery, which can use two charging cables to charge the front and rear lights at home or while traveling. The innovative design provides up to 5-8 hours of lighting without frequent battery changes, environmentally friendly and reusable. High Visibility: 360 reflective strip, which attracts the eye in all directions at night and has high visibility in summer and winter. The three lighting modes of the running vest are suitable for your needs: Steady Light, Fast Flash and Slow Flash. [Adjustable Size]: The reflective vest has four adjustable buttons and the waist can be adjusted between 62 and 99 cm. The running vest adapts perfectly to the body for comfort. In winter, it is easy to wear over a jacket or coat and is suitable for men, women or children. [size]: elastic band width: 4 cm, reflective film width: 1.5cm, size: 64 - 105 cm, shoulder height: 34 - 46 cm [package included]: reflective vest * 1