A great all rounder when it comes to an extended day trip then abracadabra you can expand the back and increase pack size by 2 litres and get more into the main compartment which also features an organiser pocket for tools etc the drinking system not supplied is accommodated in a separate easy access compartment at the back so you can stay hydrated all day should the weather turn then the rain cover is easily deployed until the storm clouds blow over you can also easily stow your helmet