Helmets with built-in communications systems; protective helmets; bags specially adapted for protective helmets; two-way wireless transmitters and receivers mounted on protective helmets; intercoms mounted on protective helmets; articles of protective clothing for wear by motorcyclists for protection against accident or injury; helmets for motorcyclists; stands adapted to hold navigation instruments for motorcycle; black boxes [data recorders] for motorcycles; electronic keys for motorcycles; visors for helmets.