At just over 3 oz., the Salomon Fast Wing offers the superlight wind protection racers and trail runners need with a Motion Fit for unrestricted movement. Jacket stows in chest pocket.. . . . . . . Double nylon ripstop fabric . Lightweight windproof protection. AdvancedSkin Shield technical fabric improves body comfort by keeping you warm, dry, and protected when and where you need it. Motion Fit for unrestricted movement. Chest stow pocket with zip closure for bring it along convenience. Reflective branding front and back for low light safety. Smart closure. Active fit .