Super lightweight rucksack or backpack

[Stumpedasatree]

Suitable for long walks, anyone seen anything similar? Other criteria would be durable and possibly waterproof.

How big does it need to be? I love osprey the most, this one is cute?

I have a cabin zero one, it’s VERY light but also tough

www.cabinzero.com/

I love my Fjaelraven Re-Kanken