There are so many large rucksacks to choose from in the marketplace. Most of them appear to be able to fulfil their function but after looking at them more closely you may find that they are mainly only suitable for unambitious walks and periods ,getting uncomfortable after hours or days on the move. I tried the Verden 65+10 and found that after a few minutes adjustment the " Biofit " system adapted to my body . This is where Berghaus scored five stars with a semi-rigid plastic base or "spine" with straps and padding for fine-tune adjustment that did not appear to be fitted on other makes.I am now training with graduated weight in my rucksack on local hills and have found that the time spent in comparing and fitting different products was well worth it. All I can hope for now is good weather to use it !