Considering the damage headphones can do to your eardrums, these Music Strap Backpack Speakers are a great alternative.
However, these Music Strap Backpack Speakers were not designed for everyday use. Instead, these convenient sound systems would be perfect "during a hike or camping so you can still hear what’s going on around you," as Oh Gizmo notes. Created by Lazy Bums, it's sold for $29.99.
Knapsack Sound Systems
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