Die hard fan for Mystery Ranch rucks. ROUS, 6500 etc. They are ridiculously well-made and most comfortable ruck I ever used.
They are obviously buy once product. Sadly I paid full price for this.
If cash is short I would recommand GTFO duffel for from FC. Another no brainier go to brand for durability and price.
They are superbly made, not at quality level of Mystery Ranch (so as friendlier price) but it serve me well.
https://www.flyingcirclegear.com/gtfo-top-load-duffel-backpack/#product-additional-info
This is also perfect for motorcycle too when I went on long ride.
Also, if someone saw Mystery Ranch brand on your backpack it can get stolen easily, I don't know why (why not go for LV/Gucci? how they know?).
I go so far to remove all brand tag when I prep them.