Heading out for a long run? Not sure about the weather, or your ability to navigate and get home before dark? When you need to bring a few extra pieces of kit with you, or if you're going fast and light, the Duro accommodates just enough fuel and gear to get you there and back—no matter how far "there" may be. With ample room for long runs requiring extra layers or gear, thoughtful and accessible storage for fuel and other small items, a Hydraulics® LT 1.5L reservoir, soft flask compatibility, and bounce-free carry, this pack will please beginning runners and experts alike.