The Good: The JayBird Endorphin Rush Earphones offer a durable cable design with a thick cord, a reinforced L-plug, and a slider to prevent tangles. The package includes a hard-sided case, a cable manager, various eartips, and removable earclips that make for a supersecure fit. The earphones offer deep bass. The Bad: The earpieces of the Jaybird Endorphin Earphones are large and may not fit all users comfortably, and some music comes across sounding hollow and lacking in warmth. The Bottom Line: The JayBird Endorphin Rush earphones are a good choice for active people who want secure fitting earbuds without sacrificing bass or overall sound quality. \nPhoto gallery:JayBird Endorphin Rush Earphones\n\n\nJayBird first made a name for itself as a Bluetooth company, pushing out a line of stereo headphones with discreet-yet-secure designs that were made with the iPod in mind. So it was both surprising and not when the company elected to move into the wired market with two in-ear models aimed at the fitness-minded. What was surprising was the seemingly backwards step in technology, but it was actually a move inline with JayBird's focus on active users. Of the two new sets, the Endorphin Rush Athletic Earphones ($99) are the slightly more expensive and less stylish of the two. \n\nIf there's one thing the Endorphin earphones have going for them right out of the box, it's durability. The cable is exceptionally thick and features a slider at the Y for preventing tangles, which can lead to wire stress and breakage over time, and it terminates in a reinforced L-plug that seems apt for withstanding the test of time. JayBird also includes a zippered, hard-sided case in the package so that you may protect your investment when not using the headphones. In addition, there's a cable wrap for keeping the cord in perfect, unwinding condition.