The Philips Outdoor Neckband Headphone SHS850 is the first neckband headphone on the market to offer a lightweight construction with an encased fabric sleeve. The lightweight construction improves comfort for prolonged use while offering a stylish fabric sleeve design. The Ear hook is comprised of soft touch rubber, which is hardly felt on your ear when in use and will flex to fit all ear sizes. The spring metal neckband automatically adjusts to fit all sizes of head width.