As a 6-foot Broad Shouldered Man, this is Highly Impractical...

That appears to be 'eco' leather, which might not endure beyond a couple of months, even with meticulous care. If the design appeals to you, consider visiting a local leatherworker to create a similar backpack, design vice it's very simplimistic, 20-30 parts and no complicated shapes. It may cost around 150-200 EUR, but it's an investment that will pay off. Handcrafted leather backpack can last for decades, becoming a treasured heirloom you might one day pass on to your grandchildren =)

With a custom piece, you can tailor every detail to your needs, from pocket placement to size specifications for your phone, laptop, etc. Plus, as it ages, it'll develop a unique patina that adds even more character.

You planning to cosplay a Rule 63 of Lara Croft? Larry Coft?