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Opti brand zippers are also very good (like, on the same level as YKK). Not sure why they don't get as much good press.

Ever since I read an article about them posted on HN, I can never unsee them

I now regularly check for YKK symbols. Gets disappointed if one doesn't use it.

Zipper failures were the reason I quit wearing Levis in favor of Wranglers 30+ years ago. Not surprisingly, Wrangler uses YKK zippers.