The Sony MDR-J11G are vertical in-the-ear style headphones from Sony's Sports and Active Style line. The headphones feature a 13.5 mm driver unit combined with Neodymium magnets to produce powerful bass and clear sound. They are designed with a behind-the-ear non-slip clip for a secure fit during sports activities. The overall design makes them comfortable to wear and still allows the listener to hear external noise while minimizing sound leakage. The MDR-J11G are water resistant and include seals to protect the headphone's driver. They have a 4 ft adjustable tangle-free storage cord with an L-shaped stereo plug and an in-line cord clip. The headphones are similar to Sony's MDR-A35G but the two models differ in that the MDR-A35G has a slim headband and folding design compared to the MDR-J11G's behind-the-ear clips. The MDR-A35G also includes Sony's Acoustic Twin Turbo Circuitry and Moisture Guard mechanism which the MDR-J11G lacks.