Savotta is bombproof. I have their Jääkäri S,. M and L, as well as their Keikka 50L and 80L. Used the Keikka duffle bags as check in luggage for international travel, and they’re still as good as new. They use stainless steel hardware on the Keikka duffles on the stress points. All their bags are made from 1000D Cordura with a rubberized liner, so they’re quite water resistant.
CD Project (owners of GOG and creators of The Witcher) are some the most well-known devs from Poland, but this article goes into the main reasons why they are among a dozen or so more game devs where such games as Dying Light and Frostpunk have been made: https://www.n-ix.com/polish-software-developers/