Safety Level Upgrade Say goodbye to the usual sports reflective vest, this LED reflective vest features 360 degree visibility reflective strips that will keep you visible up to 900 feet away. Bright colors are also more alert. These running lights greatly increase the safety of your nighttime workouts.3 Lighting Modes & 8 LEDs This running reflective vest features 4 LED lights on the front and back to ensure you have a brighter environment while running.3 modes are: fast flash, slow flash and continuous lighting, you can switch the mode according to your preference. Breathable and Lightweight This running light is made of high-quality skin-friendly breathable material and weighs 0.31 lbs, it can be used in any season without adding any burden to your exercise.Suitable for running, cycling, dog walking, night safety protection, jogging and other night outdoor activities. One size fits all High quality stretch bar with adjustable buckle, adjustable and strong, so the running light is also comfortable to wear.The belt circumference can be adjusted from 20 - 35.4 inches. Adults and children can use it, no need to worry about the figure.Color: Green Length: 26-37"/67-94cm Waist: 21.5-37.5"/55-95cmMaterial: Elastic reflective tape Reflective distance: 985 feet away Button battery: 2 CR2032 + extra 2 batteries Rechargeable battery