Mount Tec Explorer 4S Performance Heated Mittens come with a carbon nanofiber heating system. The heated mittens have a touchscreen amara on the thumb that lets you use electronics with the mittens on. They even come with a Fantex waterproof insert that is very breathable and helps keep your hands dry! Gauntlet cuffs with drawstring closure mean these mittens grip tightly to your hands and prevent unwanted heat leakage.