Lightweight Shelter Device that's Packable, Windproof and Water-Resistant. Our lightest-weight, windproof, and water-resistant men's running jacket is like an insurance policy for your run on days when the weather looks iffy. Pack it up and use the armband for hands-free portability and a hit of reflectivity. Then, if dark clouds turn on you, this full-zip design with chin guard and draft flap keep you protected, while front and back retroreflectivity makes you visible in low light. This running jacket for men lets you head out into questionable weather with the certainty that you'll have a winning workout.