A few energy bars in the outside pockets, your hydration system in a separate compartment, your keys on the key clip, your helmet on the attachment points: a good cycling backpack makes all those kilometres truly comfortable. Therefore, a cycling backpack isn’t just any backpack. They are specially designed so that they don’t bother you at all while cycling.
A cycling backpack sits tight on your back. Therefore, the chest strap is more important than the hip belt and it should be equipped with sufficient back ventilation. Pedal on!