The Therm-ic SmartPack Supermax Trim Fit Set will keep you comfortable and warm up to 18 hours as you ski with your family on a beautiful day. All you need to do now is to get yourself to the mountain, and the outside temperature will no longer be an issue. There are three different heat settings that allow you to customize your comfort level. The Impulse Control naturally stimulates the blood circulation keeping your feet warm and healthy. The heat will flow throughout your boots while you perform on the slopes or the backside of the mountain. When you use the Therm-ic SmartPack Supermax Set the outside elements will not bring you inside to the lodge, unless you want to be in the lodge. [+]