The Gregory Z 55 Pack would work nicely on a long weekender or on a gear intensive climb up an alpine trail. No matter your trek, trail, or ascent, you can fit everything you need in this pack. The Z 55 Pack features advanced suspension that keeps you cool as you move. Push farther and faster with ventilated EVA foam on the hip belt and shoulder harnesses providing you with ultimate comfort. And with an interior hydration sleeve with a hose port, you'll stay hydrated along the way.