HTC Active Earphones
If the headphones mentioned earlier weren't what you were looking for, consider the HTC Active earphones. These soft, comfortable earphones come with three different sizes for the perfect fit and sound, not to mention are sweat, dust and waterproof.
It features in-line volume controls and hands-free calling, magnetic ends so they fit securely around your neck and out of the way when not in use, and sound great when paired with the HTC 10 Boomsound technology.
Again, these are out of stock, but should be available when the HTC 10 is released in early May.