On: Why Do So Many Zippers Say YKK? (2012)

[flyinghamster]

But even a quality zipper doesn't help much if the clothing itself has a design problem. I quit wearing Levi's jeans 30+ years ago because their zippers (I'd have to assume they were YKK) consistently failed near the top of their travel. After one failure too many, I switched to Wrangler/Rustler and never looked back, and never had another zipper go bad.

Sure enough, the Wranglers I'm wearing right now have a YKK zipper.

[hammock → flyinghamster]

Levi's uses a non-YKK zipper that they brand with their own logo

[ams6110 → hammock]

The Levi's I have use buttons.

[MagnumOpus → ams6110]

Levis 501s have buttons, Levis 505s are the same but with zippers.