Be invincible with every step. Meet the next big thing in running gear. The first of its kind, the Altra StashJack gives you the flexibility to take your jacket on or off without derailing your momentum. With a convenient hip belt pocket, you no longer have to stop your run to store your jacket when it’s not in use, you can now pack it away with ease. And the StashJack features revolutionary open-back accessibility for easy access to your backpack at any time. At just 3.3 ounces, the StashJack will streamline your running experience.