http://www.fjallraven.com/outdoor-equipment/Backpacks-and-Bags/Vintage-30-L and http://www.fjallraven.com/outdoor-equipment/Backpacks-and-Bags/Helags-40 are two options from Sweden if you want a strong backpack. I don't own one of those two but I have tested the Helags and I think I will buy it.
Since they are from Fjällräven (and Sweden) ,they will last forever.A story to prove it, a friend had a backpack from Fjällräven once when he was out driving snowmobile with a 100-150kg sleigh behind him and in some mysterious way one of the backpacks shoulderstraps was towing the sleigh and not the intended towing thing. Off the shoulderstraps seam only 1/8 was left but he still use it today hauling around stuff between 5-20kg (in a 35l bag).
Note i have connection with Fjällräven besides one of the biggest outdoor gear/clothes store and Fjällrävens outlet store is 30km away (plus it was started in my hometown )
Since they are from Fjällräven (and Sweden) ,they will last forever.A story to prove it, a friend had a backpack from Fjällräven once when he was out driving snowmobile with a 100-150kg sleigh behind him and in some mysterious way one of the backpacks shoulderstraps was towing the sleigh and not the intended towing thing. Off the shoulderstraps seam only 1/8 was left but he still use it today hauling around stuff between 5-20kg (in a 35l bag).
Note i have connection with Fjällräven besides one of the biggest outdoor gear/clothes store and Fjällrävens outlet store is 30km away (plus it was started in my hometown )