The Jääkäri L is a sturdy backpack that maintains a rigid shape thanks to the inner support frame. With compression straps, even when the backpack is not full it can be tightened so that it sits snugly. The backpack is MOLLE compatible, which makes it easy to expand its capacity. The back has been reinforced with a very durable frame made of DUR aluminium. It is possible to overpack the backpack, but it also allows for less full packing as seen in picture 7.