Ducan Spine 28-35. A hiking backpack featuring the innovative Active Spine Technology. Even distribution of the backpack's weight over the body. More freedom of movement for the hips and shoulders. Active Spine Technology ensures greater comfort. Together with the very light weight, a pocket that can be attached either to the shoulder straps or hip belt of the backpack and side pockets positioned to allow easy access while walking create a practical hiking backpack offering high comfort and variable packing volumes.