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A safety whistle is cheap and reliable. Also, it won't run out of flares or batteries. You can hang it from your backpack shoulder strap for easy access. (Imagine trying to take off and dig throug...
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A safety whistle is cheap and reliable. Also, it won't run out of flares or batteries. You can hang it from your backpack shoulder strap for easy access. (Imagine trying to take off and dig throug...