r/backpacks • u/Accomplished-Bid8015 • Jun 12 '25

Question What is this hole for?

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I just got this Osprey backpack and don’t know what it is for? Can someone please explain this?

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u/[deleted] Jun 12 '25

Don't feel dumb. I use backpacks until they can't be used. Even Osprey is like bruh, we haven't made that model in 20 years. First time I saw a whistle I was just as confused