For athletic hikers looking for a comfortable day pack with maximum ventilation. This lightweight, technical backpack is perfect for more athletic day hikes: The Aircomfort back system is extremely comfortable and the new-style mesh creates maximum airflow across the back. The result is 25% less perspiration and consequently, increased performance. The stretch mesh front pocket is great for airing wet clothes on the move (after a quick dip in a mountain stream, for example). The main material of the Futura series is made of bluesign(R) certified material. deuter - Futura 23l Backpack atlantic ink