The HS34 clip on the ear and the cord runs behind the ear, so they won't come off during exercise and touch noise is minimized for great listening. Because the HS34 are water resistant (IPX2 equivalent*), they're great for sports use.
*Specifications are equivalent to IPX2 of IEC 60529.
The clip hanger keeps the HS34 firmly held to the ear, and the position of the inner part can be adjusted for a comfortable fit. Multiple color variations are available so you can coordinate with your sportswear and shoes.