A multifunction hat system is disclosed, comprising at least a head covering unit, an ear covering unit that can be removably or permanently attached to the head covering unit, and a face covering unit that can be removably or permanently attached to either the head covering unit, the ear covering unit, or both. Other modules, such as a scarf, ski goggles, earphones, safety lights, a helmet, and so on, may also be removably or permanently attached.
