Lightweight and secure enough for vigorous active use, the MDR-J10 headphones--part of Sony's h.ear line--feature a comfortable, vertical, in-ear form, a clip-on fit that follows the contour of your ears, and a stable, non-slip design built to withstand exercising, skating, dancing, or other sports. The MDR-J10 earcups use an open-air design that lets you hear ambient sound. This ability to hear outside noises is a safety issues as much as a quality of sound issue. With these headphones, you can keep track of car horns, passing bicyclists and barking dogs.

These headphones have 13.5 mm driver units; while small enough to place comfortably inside the ear, they are also powerful units producing a nice bass sound. Neodymium magnets give the headphones maximum energy at a minimal size and weight. The MDR-J10's clip-on design is hair-friendly and keeps the size of the headphones small. Their tangle-free storage cord is adjustable, making for easy storage in a backpack, briefcase or purse. The headphones come with a 3.5-foot cord, and their L-shaped plug is tailor-made for active use and won't bend and break like an upright plug might.