Deuter backpacks.

In many years of backpacking I never met someone who had trouble or regrets with a deuter bag.

I broke one of the steel rods in mine after years of heavy use and clearly by my own fault and way out of any manufacturer responsibility and they just replaced it for free. I just asked if there is any way to get spare parts and they were like “Here you go, have a good trip.”

Besides that, you have put in serious effort or serious stupidity (in my case) to break them at all. Especially normally easily breakable parts like clasps and zippers, are super sturdy.

YKK zips. On anything I’ve ever owned, they don’t break. And I find that more durable clothing brands will use YKK zips.