[VISIBILITY]: M fluorescent yellow safety vest keeps you safe and reduces risks of accident for construction, surveyors, roadside emergency, bicycling and many more applications. [COMFORT]: 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). [REFLECTIVE STRIPS]: 2 vertical and 2 horizontal reflective strips with 2 width on both, front and back, for maximum visibility in all weather and lighting conditions. [DESIGN]: Quick and easy front zipper closure design allows for easy on and off anywhere you go like the worksite. [APPROVED]: ANSI/ ISEA 107-2010 (former edition 107-2004) Class 2 standard of high-visibility safety apparel approved.