【High-quality & Comfortable & Adjustable】： This reflective running vest is made of high-quality materials. It features skin-friendly, comfortable and freely adjustable, suitable for men, women, and children. 【Protect Safety】： Our safety vest has super bright LED lights and reflective tape, ensure that you can be seen in the dark from all angles, making it a must-have for morning and late night running, biking, hiking, motorcycles, jogging, mountain biking, and horse riding. 【8 Lights & 3 Modes】： This reflective running gear has two sides of bright 4 LED strips (4 red LEDs on the back & 4 white LEDs on the front), allowing you to be seen 360 degrees. Both of the two sides of LEDs have 3 modes: steady light, Rapid turn signal, Slow Intermittent. 【Wear it Anytime of Year】： 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. Experience a perfect fit and zero bounce, no matter the season or clothes, Spring, Summer, Fall, or Winter, the reflective gear will go as long as you do, even rain and snow won't slow you down. 【NOTE】： You must remove the plastic sheet between the battery and the circuit board before use. This reflective gear uses a replaceable lithium-ion button battery(CR2032), which you can easily buy in stores.