Bose teamed with Reebok to create a total athletic headphone package with the SIE2i. They put Bose’s renowned sound quality into a stable, sweat- and water-resistant chassis that features a hydrophobic cloth cord and a Reebok Fitness armband to keep your smartphone or mp3 player out of the way. The result is a high-end, fully functional sound system so you can rock out on your workout. The three-button in-line remote makes calls and track changes easy, so you can keep the momentum—and motivation—going. The SIE2i had sound quality to match some of its higher-ranked competition, but its heavy price tag dragged it down our list.