[Be Seen, Be Safe] The LED reflective vest is bright at night and provides high visibility to protect you, and the LED night running gear is clearly visible even in harsh environments at 1000 feet. [Rechargeable] will provide you with a reflective vest with 2 mini - USB so that the vest can be charged in both front and back. We have greatly increased the battery charging speed and battery life, which makes the simket LED reflective vest meet a long battery life of more than 48 hours in a single charge. Lighting Mode:There are three lighting modes, fast flash, slow flash and steady light. Various lighting modes give you a variety of choices. Make sure to be 100% visible in the dark and have good warning effect on distance vehicles. Even on rainy and foggy days, its existence cannot be ignored. And has waterproof function [Adjustable Comfort] reflective running vest from 33 inch to 65 inch in shoulder length and 26 inch to 49 inch in waist. Just slide the buckle to get a size suitable for all ages and genders. Reflective vest only 110G, uncomfortable to wear, moderate elastic, durable and will not fall off