Inside, there is ample space for work documents and a laptop, or even a change of clothes, and a zip-around expansion section on the front creates more room when required. Anatomically formed, they guarantee comfortable movement range. The chest strap further secures the fit. Breathable Mesh wings on the hip belt stabilize the load. Two contour-shaped layers of knobbly foam with AirMesh lining and minimal back contact provide maximum airflow. Flexible aluminium stays within the foam profile can be bent to fit the back exactly. (Bike I, Superbike and Trans Alpine).