Sidelhorn Pkb Jkt Rossignol NoirReady. Set. Explore. The men's Rossignol Sidelhorn Packable Jacket is an ultralight, windproof trail running and hiking jacket that packs into its own chest pocket. Stow it in your running vest or day pack and hit the trail prepared for changing weather. The minimalist design resists occasional light rain and maintains breathability for extended efforts. Regular Fit Cut for a classic fit with a little extra room for comfort, allowing for freedom of