I have a service dog, and was tired of my purse hitting her accidentally, so decided to find a backpack I like. While I haven't had to wash this yet, I really like this so far. It seems pretty durable, and has survived my abuse thus far. The outside material, for those unfamiliar with jute rice bags, is almost like a tweed or burlap material. It's pretty bohemian. The inside is lined with a softer material. It states it's not designed for heavy loads, and I wouldn't push that too far, but it carries at least several large textbooks worth of weight without any visible strain. The wooden buttons are pretty cool looking, but the loops they go through do take a bit of stretching out for easier access.
I'm really glad I purchased this bag, and would be quite shocked to see another like it. My only worry is how it'll hold up in the wash, but that's more of a concern about the color than the material.
Overall, highly recommended!