2 pieces Comfortable and lightweight: Comfortable and lightweight: high-quality high-elastic knitted fabric and high-brightness reflective fabric to achieve 360 lightweight visibility. Not only is the highly reflective vest visible from over 200 meters, it is also suitable for various weather conditions and maintains a safe range during outdoor activities at night. HIGH VISIBILITY: Adjustable body straps, elastic straps and 4 adjustable buckles, adjustable size, multiple sizes available. You can quickly adjust the waist and shoulder width for a snug fit so you don't move during outdoor activities. Ideal for winter outerwear: The high-end design is fully adjustable and breathable, ensuring maximum flexibility. It fits any clothing (e.g. bulky jackets, sweatshirts, activewear). Suitable for summer, winter and cold environments. Provides visibility across many activities. It's the easiest way to increase the safety of you and your family. Great for walkers, runners, motorcycles. Versatile: This reflective vest is perfect for running, jogging, biking, hiking, biking, walking, dog walking, and all outdoor activities. It will also do the same for the construction worker and the policeman who must guide himself and his colleagues.