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This Backpack Has a Hidden Whistle for Any Emergency

This backpack came with a handy buckle that is perfect for outdoor activities like hiking and exploring. There's a little hidden whistle on it that most people would never notice at first glance. It can be useful for alerting other people if you're in trouble and might even be able to save you from a bear attack, making it a really great thing to add to a backpack.

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Lots of backpacks come with hidden additions, and a whistle is a really convenient thing to carry with you on the go in terms of safety, especially if you're on your own.