After choosing the correct back length (SL or Standard), you can use the Vari-Quick system for your own personal comfort.
To use: Loosen and pull out the Velcro closure. Put the harness strap into the right position, then lace the straps through 4 attachment loops. Tighten the strap and secure the Velcro closure.
For heavy loads (from out 10kg) and longer walking distances in particular, the ideal adjustment to the user's back length is crucial. This means it makes absolute sense to equip packs from a volume of 35litres with a Vari-Quick system. Yet, keep in mind that every system with a back length adjustment means additional weight. For smaller capacities keep the pack's own weight as low as possible.