Deuter Trail 25 - The reduced contact surface and large ventilation channels of the Deuter Airstripes back system combined with perforated shoulder straps and hip fins ensure maximum airflow and even weight distribution – for a snug, secure fit over any terrain. Loops on the shoulder straps keep via ferrata set carabiners close at hand. And thanks to a large front zipper opening, front stash pocket, and side pockets, equipment and gear are always easy to access.