CNET has a review of the Motorola S9 and writes - “Sleek and aerodynamic, the S9 weighs less then an ounce, which makes it one of the lightest stereo headphones we’ve seen. It also employs a simple, behind-the-head design that isn’t clunky and doesn’t look too conspicuous when worn. The rearmost portion of the headset, which holds the power button and charger jack, is the largest part of the S9 at almost an inch wide, but the ends connecting the earbuds taper to a slim diameter of .25 inch. We tested the red-and-blue version, but it also comes in a more subtle gray-and-black model as well. The S9 is water- and sweat-resistant, so you won’t have to worry about wearing it during a hard workout.”

Read more about the Motorola S9 Bluetooth Active Headphones