Elasticized Fabric Buckle closure [ULTRA HIGH VISIBILITY]Unlike other reflective running vests and hi viz cycling gear, our 2022 New LED reflective vest conbain LED flash light & TPU light-guiding tube, and reflective gear reflector chest belts actively keep you safe by alerting distracted drivers and traffic before their headlights are on you. The unique Y shape of the led lights guarantees a larger visibility area, illuminating both sides of the body and making you visible from over 1000 feet in any direction [2 LED LIGHTS & 3 MODE OPTIONS]This LED flashing sash is equipped with super-bright LED lights on the front and rear sides, the white light on the front is To ensure that your eyes are more comfortable and the red light on the back allows you to be better seen in the dark. 3 modes that will be hard to miss. Turn on the "Flashing" strobe setting for more attention-grabbing lighting. Mode 1, Slow flash and fast flash alternately; Mode 2, only fast flash; Mode 3, only slow flash. 2 [REPLACEABLE BATTERY]This reflective equipment glow with led liges& TPU light-guiding tube powered by 2*CR2032 replaceable batteries, very bright in the dark and nighttime activities. Keep you be seen& be safe at night for you, your children or your pets. Compared with other products, running vest for men has a longer battery life. At the same time, you can easily buy it in the store. Note: The plastic sheet between the battery and the circuit board must be removed before use. [ELASTIC and ADJUSTABLE]Adjust waist 20"-38"; Adjust shoulder 16"-24"; suit for man/women/adult/teens. The slim, minimalist design ensures minimal fabric-to-body contact, less sweat-trapping and a very elastic belt so that you can put this LED reflective vest very comfortably on any cloth. Expand it to fit over your cold weather coat or jacket or adjust it down to fit more snug on t-shirts or singlets during those hot summer night activities. [PARAMETER]Reflective gear visible range:1000 feet; LED Light visible range:1200 feet; Weight: 150g, This LED night running gear is designed to be completely waterproof, from the power unit to the LED safety lights. You don't have to worry about using it no matter the weather outdoors. Gift Idea -If you or your friends love running at night, then this night running safety gear will give them sufficient protection and will be the best birthday gift