Perhaps the easiest way to stay grounded when you are on the go. Reversible rubber material is black on one side, gray color on the other. Non-marking on most surfaces. Slip over the heel and wrap the Velcro™ strap around the front of your ankle to hold it in place. Conductive tag can go inside the shoe or into the top of your sock to make contact with your skin. Includes 1 MegOhm resistor. Static dissipation to zero volts is accomplished in less than 0.1 seconds on any conductive surface. Keeps body voltage low.