well, this rucksack can be also useful for some scientists (botanists/zoologists) as they explore some regions, mountains sometimes. As far as I know the basic idea of a rucksack is to redistribute the weight from the back to the hips and thus reduce the possibility of column, shoulders damages. And this is exactly what this product do due to the bottom strap. The only thing I can't understand is how it produce electricity? (solar panels)?
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