Main features of this product: ~ HIGH VISIBILITY: fluorescent yellow safety vest keeps you safe and reduces risks of accident for construction, surveyors, roadside emergency, bicycling and many more applications ~ REFLECTIVE STRIPS: 2 vertical and 2 horizontal reflective strips with 2” width on both front and back for maximum visibility in all weather and light conditions ~ MAXIMUM BREATHABLILITY: lightweight and comfortable 100% polyester fabric (Model in pictures is wearing a Large - we recommend sizing 1 size up for a slimmer fit and 2-3 sizes for a looser fit) ~ QUICK EASY ZIPPER: front zipper closure design for easy on and off ~ ANSI/ ISEA 107-2010 (former edition 107-2004) Class 2 standard of high-visibility safety apparel