Abstract: Various helmet communication, entertainment, and safety techniques are enabled. For instance, a method comprises receiving, by a helmet user-interface system comprising a processor, an output from a sensor, determining, by the helmet user-interface system, whether the output comprises gesture information representative of a gesture, in response to the determining and based on a condition being determined to be satisfied, identifying, by the helmet user-interface system, a gesture type associated with the gesture information, and executing, by the helmet user-interface system, a function associated with the gesture type.