In all honesty, most of the time you don’t need a shell jacket, but when you do, it’s nice to have one at hand. That’s the whole reason why the Come Along Jacket exists. It will shelter you from unexpected weather like an invisible shield, but it’s light and packable enough to bring it along all the time. The Come Along Jacket is designed in ultra strong recycled nylon, using Houdini's Made to Move concept for maximum freedom of motion, making this an excellent jacket for running or climbing.