The optional Motion Control feature in the Inuheat App uses the phone’s accelerometer to know when you are in active motion vs. low/no motion conditions and adjusts the heating power to the user based on activity level. One of the key use cases it was designed for was skiing and snowboarding, where you are inactive waiting for the lift line, but become quite active while downhill skiing or snowboarding. This is one of various times that Motion Control could be a helpful benefit to your outdoor enjoyment. Simply set the heat level for your low-activity period, and the App will instruct your PowerPacks to lower the heat a few levels automatically when it senses that you have moved into your active phase, when you are likely producing your own incremental heat. This feature can save on battery life and keep you from building up excessive heat which can produce sweat and associated conductive heat loss when you become wet inside your clothing layers.