Hit the trail in the minimalist, tough, and supportive Deuter Pulse 3.5L Hydration Pack. Designed for bikers, hikers, and all-around endurance athletes, this lumbar pack carries with you just the bare necessities—like water, a first aid kit, maps, and your phone—and not much else. The included 1.5L water reservoir, which was specifically designed to fit the contour of the bag, keep hydration close at hand whenever you need it, while the breathable foam back helps ensure that cooling airflow continues to circulate as you work up a sweat. Multiple pockets keep your smaller trail essentials organized, and the 3M reflective elements give you an added level of visibility in low-light conditions.