Zone sites are in the business of providing both recreational and competitive indoor laser games (or laser tag). The games require players to wear vests, or packs that contain a number of infrared sensors, and carry around a laser emitting phasor which activate these sensors and deactivate the hit player's pack and phasor for a period of time. There are many different kinds of game formats, many of which are team-based and played with three teams total. In most cases the games are played in large indoor arenas.