Buckle closure1. HIGHLY VISIBLE AND SAFE - The 360 degree reflective vest keeps you safe in all weather conditions. Ultra-reflective running gear can be seen from 800 feet or more. You can relax. Because you're wearing high-performance reflective gear and are safer.2. TOP QUALITY - The reflective straps are made of high quality nylon fabric with super bright reflective silver stripes, and the buckles and strap adjusters are made of hard plastic. reusable.3. Elastic and Adjustable: The reflective safety vest with 4 adjustable buckles can expand from 15" to 20" from shoulder to waist, and from 27" to 38" waist. You can freely adjust the size of the reflective vest, allowing you to move freely.4. CONVENIENT AND EASY TO CARRY - Fully adjustable and breathable design allows for a full range of motion. Highly flexible, one size fits best for men, women and kids. It's also super lightweight and easy to carry. Any outfit for any season.5. Versatility: A high-visibility reflective vest for any outdoor activity; including hiking, running, biking or motorcycles, walking, jogging, construction or traffic work, roadside emergencies requiring high-visibility clothing