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Okan Esenleft a comment
Excuse my ignorance but what is the difference between these and the ones you can get on Amazon: https://www.amazon.com/ETY-Plugs-Fidelity-Earplugs-Standard-Frost/dp/B0015WJQ7A/ref=sr_1_1_a_it?ie=UTF8&qid=1475353038&sr=8-1&keywords=ety+plugs
EarDialThe invisible smart earplugs for live music