The Epic is the signature piece in MOUNTAINSMITH newest technical lumbar collection. This running or fast-hiking design is the most comfortable, stable and functional lumbar pack to ever see the trail. A one-liter, roll-top reservoir with the unique anti-slosh feature makes carrying this much water quiet and stable. The air flow back suspension system keeps the load comfortably away from your lower back, promoting excellent ventilation. Lots of room for gel, jackets, music and other essentials.