The Sony MDR-AS20J are vertical in-the-ear style headphones from Sony's Sports and Active Style line. The headphones are uniquely designed with loop hangers that go around the ear to prevent the headphones from falling off during activities. The soft design of the loop hangers makes them able to fit a wide range of ear sizes. The MDR-AS20J have 13.5 mm drivers with Neodymium magnets which combine to provide clear sound and powerful bass. The have a 2 ft cord which makes it possible to use them with an arm-band as well as a 2 ft extension cord. The cord also has a detachable clip and a gold-plated straight stereo plug. The MDR-AS20J are a little less flexible in sizing in comparison with Sony's MDR-AS40EX since they don't come with the various earbud and hanger sizes that the MDR-AS40EX includes.
