When you are out hitting the slopes, you may want to remember your body needs to maintain a proper core temperature. Heat escapes through your hands and feet, so remember to wear warm boots and gloves when you're out playing in the snow. Avoid catching a cold by wearing these battery operated insoles inside your boots. A wafer thin insole slips into each boot, connects to a flat wire, then to a removable battery pack outside your boots. You can select from three heat settings ranging from 99-158 degrees. You can enjoy toasty tootsies for up to 10 hours. Product Page Price: $129.95 [Via Fitness Gadgets]