This lightweight backpack benefits from an outstanding comfort-to-weight ratio (with a removable lid and compression straps when every gram counts). The deuter Aircontact back system equally keeps the weight down, but above all creates ventilation across the back. The length of the back is adjusted via Clip & Loop system and ergonomic hip fins create a snug, comfortable fit while distributing the load effectively. The hard-wearing ripstop body fabric made from performance fibers is also built to withstand the rigors of thru-hiking. deuter - Aircontact Ultra 40l+5 Trekking Backpack tin shale