The osprey duro 15 backpack the award winning duro brand new for spring rsquo17 uses ospreyrsquos renowned attention to detail and an uncompromising range of features to provide a phenomenally high performance running pack built to carry a versatile and customisable hydration system to allow the runner easy access to water these vest style packs also include multiple pockets innovative pole attachments for aided running and reflective graphics for better visibility at night