1.360Reflective VestLED vest underwear provides 360 visibility.High brightness LED luminous vest makes it more eye-catching in low light areas, while reflecting the ushered light, can exceed 1000 feet of ultra-long distance LED light reflection. And it has 3 light patterns. 2.High-light vest with USB chargingLED light supports USB charging, and the battery life is up to 35 hours. The excellent LED light-emitting material can reflect the surrounding light, even in the harsh environment of 1000 feet away, the LED night running equipment can be clearly seen. Even in rainy and foggy weather, its presence cannot be ignored. And has a rainproof function. 3.Elastic and Ad JustableThe reflective running vest increases shoulder length from 33 inches to 65 inches and waist circumference from 26 inches to 49 inches. Just slide the clasp in sizes suitable for all ages and genders Unlike other chest straps that interfere with heart rate monitors or are too tight (especially for women). Our waistbands are elastic, breathable and highly adjustable to fit all body types. It fits to your underwear and outerwear in cold weather 4.Scope of applicationReflective vest with front and rear lights, with 3 flashing modes, even if you are walking, running, or riding a bicycle in the dark, the vehicles in the distance are easy to see and eye-catching. Suitable for night running, walking, construction workers, law enforcement officers. Adjustable elastic straps make the safety vest the right size for most people, not only for men and women, but also for children's body types. 5.Lightweight and comfortableThanks to the adjustable clips, the LED reflective undershirt is not too much effort to wear. The straps are easy to adjust and have elasticity for a comfortable fit. You won't feel it at all when you're wearing it. The use of high-quality sports mesh and elastic makes the lighted undershirt sweat-proof, chafe-free and comfortable to wear.