Nice job with the minimalist packing! It really makes travel much more enjoyable when one isn't carrying around extra weight so I always encourage new travelers to pack lightly as well.

Those Fjallraven packs are such a classic design. We got the Raven 20L backpack for our travels and it makes a very good minimal pack, day pack or kid's backpack (I'd say for 7 years or older).

I saw quite a number of your style as well as the Raven 20L model in Denmark recently.

I also recommend the Minaal Carry On 2.0 which I've used for 2 years and 9 countries.

One of it's best features is the cover flap you can use to enclose the shoulder straps. It gives the pack a sleek look and keeps the shoulder straps from getting tangled in things when boarding planes or going through security.

Happy travels!