Made from extremely durable TPR rubber to not only grip easily but maximize heat to your fingers Standard room temperature operation is 170°F which provides extremely comfortable heat when riding in the cold Multiple textures and patterns in the rubber provide a comfortable grip and soothing style The E-Z temperature controller is easy to use and provides the most function available Single button control provides 5 pre-set heat settings with each touch of the button reducing 1 level until off Smart logic design allows the activation of an optional battery saver mode which will shut the grips to off if the battery voltage falls below 12.5 volts