Trail running, jogging or mountain biking, the Mens Flyweight Rain Forest Jacket gives you the basic protection you need for fast–paced sports. Jack Wolfskin's breathable Flex Shield AirLite fabric is extra light and stretchy and regulates your body temperature. So this featherweight jacket always feels great to wear on your outdoor training sessions. When the weather is constantly changing between sun, wind and showers, the Flyweight will keep you dry and agile. It also packs down easily so it will fit in your waist pack. And during evening training sessions the reflective detailing ensures you stay visible.