Find your light, find your stride. Reflective details on the back and sleeves of this lightweight jacket help keep you visible so you can keep on running. Designed for Running. Skims your body:Sits below the waistband for moderate, everyday coverage. Reflective details help keep you on the radar. Thumbholes and Cuffins. Secure front pockets. Weightless Coverage, NuluxTM Fabric. Body: 84% Nylon, 16% Lycra elastane. Hood: 100% Nylon.