SSO airborne backpack 'Bober' from Russia. I bought it years ago on Amazon. And it gets everyday, heavy use. Very sturdy and has held up well, considering all it's been through. :
Tactical Military Male Raid Backpack Backpack Sso Attack 2 60 Liters - Backpacks - AliExpress
Russia's ALICE Pack Upgrade! The Ratnik SSO Attack 2 Raid Backpack Review! - YouTube