When you're running, cycling, or hiking and weight and breathability are paramount, stick your arms into the Salomon S-Lab Light Men's Jacket and let it block the wind without slowing you down. You might think you're just imagining a jacket, but that's just because the S-Lab Light weighs only 2.5oz, courtesy of superlight nylon ripstop and Salomon's ClimaWind Pro technology, designed to keep the wind off while maintaining exceptional breathability. ClimaWind Pro nylon ripstop fabric. Active fit. Weighs just 2.5oz. Reflective front and rear details.