For comfort on the up and the down, we kit up with the EVOC Hip Pack Pro 3 1. 5L Bladder. When we're climbing, we open the Venti Flap for added airflow, and when we turn our tires downhill, we close it for a snug, shift-free fit. As we rail berms and catch air, the flexible belt follows our every move, the compression straps stop contents from bouncing, and the wide hip wings and mesh-covered padding keep the weight evenly distributed. Equipped with a reservoir and magnetic hose clip, this lumbar pack ensures we stay hydrated for round two.