Using insights from runners like you, we prioritized functionality in this slim-fitting running vest. Its sleek, reflective material combines with lightweight synthetic insulation and our heat-regulating tech to help you stay warm mile after mile.Key FeaturesSmooth, lightweight fabric for comfortNike Therma-FIT technology helps manage your body’s natural heat to keep you warmSynthetic fill helps keep you insulated and warmStand-up collar with full-zip closureZippered side pockets work with a pocket at the lower back to provide secure storage for your essentialsMore DetailsReflective details for low light visibilitySlim fitMaterial composition: 100% PolyesterSize shown: Small | Model height: 175cm