Stay Visible and Safe on Every Run Our High Beam Reflective line is specifically designed to keep you visible and safe on every run - from dusk to dawn. The Marathon Vest v2 in High Beam Reflective features an updated Comfort Glide fit system along with the best features, style and value for runners looking to go further distances. Features Class 2 high visibility yellow color helps keep you safe and seen at night Comfort glide back adjuster system for full body adjustability Comes in 2 sizes for customizable fit Includes 2 Flex Form(TM) II 300 bottles so you have everything you need to run your first ultra Large back pocket can hold up to a 2 liter reservoir (not included) 2 rear pockets, 2 lat pockets and 5 front pocket provide plenty of storage and organization Specifications Volume Capacity: 330 in 3 / 5.41L Weight: 4.8 oz. / 136 g Materials Main body: 100% polyester perforated woven Mesh pockets: 80/20 nylon spandex stretch mesh Sizes XS/SM: 53 - 102 cm / 20 - 40 in MD/LG: 76 - 117 cm / 30 - 46 in | Ultimate Direction Marathon Vest v2 High Beam Reflective Size XS/Small