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 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.