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. Aircontact System Air Spacer Mesh - Back-friendly spacer fabric Round profile frame made of permanently elastic spring steel lumbar pad for effective load transfer onto the pelvis Comfortable to wear thanks to movable, ergonomically shaped Active Fit shoulder straps with soft-edge finishes Load adjustment strap Adjustable sternum belt ergonomic padded hip fins Pull-forward adjustment with automatic side compression snug hip fins Attachment loops Helmet net can be retrofitted modular gear straps Removal backpack lid Height adjustable lid Zippered lid compartment top-loader with roll-top closure extandable capacity (5L) Drinking system compartment Compatible with 3.0 liter drinking system/bag SOS label Signal whistle mesh side and front pockets PFAS free ClimatePartner certified product bluesignA(R) product Green Button certified product 500D TEXTURED PA 235 D REC PA PLAIN bluesignA(R) Weight 2.67 lbs Volume 40 liters Dimensions 28 / 10 / 9.1 (h x w x d) in Back length 17 - 24 in Body height 67 - 81 in